Draw a sphere: Difference between revisions
Added ZX81 BASIC
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#g circle(75) 'make a circle with radius 75
render #g 'show it</lang>
=={{header|Sinclair ZX81 BASIC}}==
Works with 1k of RAM. A screenshot of the output is [http://www.edmundgriffiths.com/zx81sphere.jpg here].
<lang basic>10 LET I=21
20 LET J=2
30 FOR K=-PI TO PI STEP 0.07
40 PLOT 21+I*SIN K,22+21*COS K
50 PLOT 21+21*SIN K,22+(I-1)*COS K
60 NEXT K
70 LET I=I-J
80 LET J=J+1
90 IF I>0 THEN GOTO 30</lang>
=={{header|Batch File}}==
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