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Chaos game (view source)

Revision as of 16:28, 12 November 2021

20,203 bytes added ,  2 years ago
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→‎{{header|Phix}}: added syntax colouring, made p2js compatible
(Added Fōrmulæ solution)
m (→‎{{header|Phix}}: added syntax colouring, made p2js compatible)
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Implements five of the fractals on the wikipedia page.
{{libheader|Phix/pGUI}}
{{libheader|Phix/online}}
<lang Phix>-- demo\rosetta\Chaos_game.exw
You can run this online [http://phix.x10.mx/p2js/chaos.htm here]. Press space to cycle through the five fractals.
include pGUI.e
<!--<lang Phix>(phixonline)-->
 
<span style="color: #000080;font-style:italic;">--
Ihandle dlg, canvas
-- demo\rosetta\Chaos_game.exw
cdCanvas cddbuffer, cdcanvas
-- ===========================
 
--</span>
enum TRI,SQ1,SQ2,SQ3,PENT
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 
<span style="color: #008080;">include</span> <span style="color: #000000;">pGUI</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
sequence descs = {"Sierpinsky Triangle",
"Square 1",
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">canvas</span>
"Square 2",
<span style="color: #004080;">cdCanvas</span> <span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span>
"Square 3",
"Pentagon"}
<span style="color: #008080;">enum</span> <span style="color: #000000;">TRI</span><span style="color: #0000FF;">,</span><span style="color: #000000;">SQ1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">SQ2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">SQ3</span><span style="color: #0000FF;">,</span><span style="color: #000000;">PENT</span>
 
integer mode = TRI
<span style="color: #004080;">sequence</span> <span style="color: #000000;">descs</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"Sierpinsky Triangle"</span><span style="color: #0000FF;">,</span>
 
<span style="color: #008000;">"Square 1"</span><span style="color: #0000FF;">,</span>
function redraw_cb(Ihandle /*ih*/, integer /*posx*/, integer /*posy*/)
<span style="color: #008000;">"Square 2"</span><span style="color: #0000FF;">,</span>
atom {w,h} = IupGetIntInt(canvas, "DRAWSIZE")
<span style="color: #008000;">"Square 3"</span><span style="color: #0000FF;">,</span>
atom {x,y} = {w*0.05,h*0.05}
<span style="color: #008000;">"Pentagon"</span><span style="color: #0000FF;">}</span>
{w,h} = {w*0.9,h*0.9}
sequence points = iff(mode<SQ1?{{x,y},{x+w/2,y+h},{x+w,y}}:
<span style="color: #004080;">integer</span> <span style="color: #000000;">mode</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">TRI</span>
iff(mode<PENT?{{x,y},{x,y+h},{x+w,y+h},{x+w,y}}
:{{x+w/6,y},{x,y+h*2/3},{x+w/2,y+h},{x+w,y+h*2/3},{x+w*5/6,y}}))
<span style="color: #008080;">function</span> <span style="color: #000000;">redraw_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000080;font-style:italic;">/*posx*/</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">/*posy*/</span><span style="color: #0000FF;">)</span>
cdCanvasActivate(cddbuffer)
<span style="color: #004080;">atom</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">h</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupGetIntInt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"DRAWSIZE"</span><span style="color: #0000FF;">)</span>
integer last = 0
<span style="color: #004080;">atom</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">w</span><span style="color: #0000FF;">*</span><span style="color: #000000;">0.05</span><span style="color: #0000FF;">,</span><span style="color: #000000;">h</span><span style="color: #0000FF;">*</span><span style="color: #000000;">0.05</span><span style="color: #0000FF;">}</span>
for i=1 to 1000 do
<span style="color: #0000FF;">{</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">h</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">w</span><span style="color: #0000FF;">*</span><span style="color: #000000;">0.9</span><span style="color: #0000FF;">,</span><span style="color: #000000;">h</span><span style="color: #0000FF;">*</span><span style="color: #000000;">0.9</span><span style="color: #0000FF;">}</span>
integer r = rand(length(points))
<span style="color: #004080;">sequence</span> <span style="color: #000000;">points</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">mode</span><span style="color: #0000FF;"><</span><span style="color: #000000;">SQ1</span><span style="color: #0000FF;">?{{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">}}:</span>
if mode=TRI or r!=last then
<span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">mode</span><span style="color: #0000FF;"><</span><span style="color: #000000;">PENT</span><span style="color: #0000FF;">?{{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">}}</span>
atom {nx,ny} = points[r]
<span style="color: #0000FF;">:{{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">/</span><span style="color: #000000;">6</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span><span style="color: #0000FF;">/</span><span style="color: #000000;">3</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">h</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span><span style="color: #0000FF;">/</span><span style="color: #000000;">3</span><span style="color: #0000FF;">},{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">w</span><span style="color: #0000FF;">*</span><span style="color: #000000;">5</span><span style="color: #0000FF;">/</span><span style="color: #000000;">6</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">}}))</span>
{x,y} = {(x+nx)/2,(y+ny)/2}
<span style="color: #7060A8;">cdCanvasActivate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
cdCanvasPixel(cddbuffer, x, y, CD_GREY)
<span style="color: #004080;">integer</span> <span style="color: #000000;">last</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
if mode=SQ2
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">1000</span> <span style="color: #008080;">do</span>
or mode=SQ3 then
<span style="color: #004080;">integer</span> <span style="color: #000000;">r</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">rand</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">points</span><span style="color: #0000FF;">))</span>
r = mod(r,length(points))+1
<span style="color: #008080;">if</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">=</span><span style="color: #000000;">TRI</span> <span style="color: #008080;">or</span> <span style="color: #000000;">r</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">last</span> <span style="color: #008080;">then</span>
if mode=SQ3 then
<span style="color: #004080;">atom</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">nx</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ny</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">points</span><span style="color: #0000FF;">[</span><span style="color: #000000;">r</span><span style="color: #0000FF;">]</span>
r = mod(r,length(points))+1
<span style="color: #0000FF;">{</span><span style="color: #000000;">x</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{(</span><span style="color: #000000;">x</span><span style="color: #0000FF;">+</span><span style="color: #000000;">nx</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,(</span><span style="color: #000000;">y</span><span style="color: #0000FF;">+</span><span style="color: #000000;">ny</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">}</span>
end if
<span style="color: #7060A8;">cdCanvasPixel</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CD_GREY</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #008080;">if</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">=</span><span style="color: #000000;">SQ2</span>
last = r
<span style="color: #008080;">or</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">=</span><span style="color: #000000;">SQ3</span> <span style="color: #008080;">then</span>
end if
<span style="color: #000000;">r</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">r</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">points</span><span style="color: #0000FF;">))+</span><span style="color: #000000;">1</span>
end for
<span style="color: #008080;">if</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">=</span><span style="color: #000000;">SQ3</span> <span style="color: #008080;">then</span>
cdCanvasFlush(cddbuffer)
<span style="color: #000000;">r</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">r</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">points</span><span style="color: #0000FF;">))+</span><span style="color: #000000;">1</span>
IupSetStrAttribute(dlg, "TITLE", "Chaos Game (%s)", {descs[mode]})
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
return IUP_DEFAULT
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #000000;">last</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">r</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
function timer_cb(Ihandle /*ih*/)
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
IupUpdate(canvas)
<span style="color: #7060A8;">cdCanvasFlush</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
return IUP_IGNORE
<span style="color: #7060A8;">IupSetStrAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"TITLE"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"Chaos Game (%s)"</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">descs</span><span style="color: #0000FF;">[</span><span style="color: #000000;">mode</span><span style="color: #0000FF;">]})</span>
end function
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function map_cb(Ihandle ih)
cdcanvas = cdCreateCanvas(CD_IUP, ih)
<span style="color: #008080;">function</span> <span style="color: #000000;">timer_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">)</span>
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas)
<span style="color: #7060A8;">IupUpdate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">)</span>
cdCanvasSetBackground(cddbuffer, CD_WHITE)
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_IGNORE</span>
cdCanvasSetForeground(cddbuffer, CD_GRAY)
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
return IUP_DEFAULT
end function
<span style="color: #008080;">function</span> <span style="color: #000000;">map_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
 
<span style="color: #000000;">cdcanvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_IUP</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
function esc_close(Ihandle /*ih*/, atom c)
<span style="color: #000000;">cddbuffer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_DBUFFER</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span><span style="color: #0000FF;">)</span>
if c=K_ESC then return IUP_CLOSE end if
<span style="color: #7060A8;">cdCanvasSetBackground</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CD_WHITE</span><span style="color: #0000FF;">)</span>
if c=' ' then
<span style="color: #7060A8;">cdCanvasSetForeground</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CD_GRAY</span><span style="color: #0000FF;">)</span>
mode += 1
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
if mode>PENT then
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
mode = TRI
end if
<span style="color: #008080;">function</span> <span style="color: #000000;">key_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">atom</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">)</span>
cdCanvasClear(cddbuffer)
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #004600;">K_ESC</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #004600;">IUP_CLOSE</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
IupRedraw(canvas)
<span style="color: #008080;">if</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">=</span><span style="color: #008000;">' '</span> <span style="color: #008080;">then</span>
end if
<span style="color: #000000;">mode</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
return IUP_CONTINUE
<span style="color: #008080;">if</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">></span><span style="color: #000000;">PENT</span> <span style="color: #008080;">then</span>
end function
<span style="color: #000000;">mode</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">TRI</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
procedure main()
<span style="color: #7060A8;">cdCanvasClear</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
IupOpen()
<span style="color: #7060A8;">IupRedraw</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">)</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
canvas = IupCanvas(NULL)
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_CONTINUE</span>
IupSetAttribute(canvas, "RASTERSIZE", "640x640")
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
IupSetCallback(canvas, "MAP_CB", Icallback("map_cb"))
IupSetCallback(canvas, "ACTION", Icallback("redraw_cb"))
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
 
<span style="color: #7060A8;">IupOpen</span><span style="color: #0000FF;">()</span>
dlg = IupDialog(canvas)
IupSetAttribute(dlg, "TITLE", "Chaos Game")
<span style="color: #000000;">canvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupCanvas</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"RASTERSIZE=640x640"</span><span style="color: #0000FF;">)</span>
IupSetCallback(dlg, "K_ANY", Icallback("esc_close"))
<span style="color: #7060A8;">IupSetCallbacks</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"MAP_CB"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"map_cb"</span><span style="color: #0000FF;">),</span>
 
<span style="color: #008000;">"ACTION"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"redraw_cb"</span><span style="color: #0000FF;">)})</span>
IupShow(dlg)
<span style="color: #000000;">dlg</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupDialog</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">`TITLE="Chaos Game"`</span><span style="color: #0000FF;">)</span>
IupSetAttribute(canvas, "RASTERSIZE", NULL)
<span style="color: #7060A8;">IupSetCallback</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"KEY_CB"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"key_cb"</span><span style="color: #0000FF;">))</span>
Ihandle timer = IupTimer(Icallback("timer_cb"), 40)
IupMainLoop()
<span style="color: #7060A8;">IupShow</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
IupClose()
<span style="color: #7060A8;">IupSetAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"RASTERSIZE"</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">)</span>
end procedure
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">timer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupTimer</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"timer_cb"</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">40</span><span style="color: #0000FF;">)</span>
 
<span style="color: #008080;">if</span> <span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()!=</span><span style="color: #004600;">JS</span> <span style="color: #008080;">then</span>
main()</lang>
<span style="color: #7060A8;">IupMainLoop</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupClose</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<!--</lang>-->
 
=={{header|Plain English}}==
Petelomax
7,805

edits

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