Sierpinski arrowhead curve: Difference between revisions
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</lang>
=={{header|Mathematica}} / {{header|Wolfram Language}}==
<lang Mathematica>ClearAll[DoStep]
DoStep[Line[{x_, y_}]] := Module[{diff, perp, pts},
diff = y - x;
perp = Cross[diff] Sqrt[3]/2;
pts = {x, x + diff/4 + perp/2, x + 3 diff/4 + perp/2, y};
{Line[pts[[{2, 1}]]], Line[pts[[{2, 3}]]], Line[pts[[{4, 3}]]]}
]
lns = {Line[{{0.0, 0.0}, {1.0, 0.0}}]};
lns = Nest[Catenate[DoStep /@ #] &, lns, 5];
Graphics[lns]</lang>
=={{header|Perl}}==
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