This program demonstrates the use of the basic shape primitive functions square(), rect(), ellipse(), circle(), arc(), line(), triangle(), and quad().
arc
弧を描画します.
ellipse
楕円（楕円形）を描画します.
A few basic shapes drawn in white and black over a grey background.
Shape Primitives
Draw 2D shapes.
A few basic shapes drawn in different colors over a blue background.
Color
Add color to your sketch.
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