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function setup() {
createCanvas(400, 400);
let rectSize = 200;
rect(100, 100, rectSize, rectSize);
rectSize = rectSize / 2;
rect(100, 100, rectSize, rectSize);
rectSize = rectSize / 2;
rect(100, 100, rectSize, rectSize);
rectSize = rectSize / 2;
rect(100, 100, rectSize, rectSize);
rectSize = rectSize / 2;
rect(100, 100, rectSize, rectSize);
rectSize = rectSize / 2;
}