このチャプターでは、四角形の描画方法について学習します。
size()https://processing.org/reference/size_.htmlsquare()https://processing.org/reference/square_.htmlrect()https://processing.org/reference/rect_.htmlquad()https://processing.org/reference/quad_.html
size(720, 480);
size(720, 480);square(50, 50, 100);rect(50, 200, 200, 100);quad(250, 50, 550, 100, 550, 200, 250, 150);