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function setup() { createCanvas(600, 400);}function draw() { background(220); // if mouse if (mouseX < 200) { fill("red"); rect((width / 3) * 0, 0, width / 3, height); noFill(); rect((width / 3) * 1, 0, width / 3, height); rect((width / 3) * 2, 0, width / 3, height); }else if (mouseX < 400) { noFill(); rect((width / 3) * 0, 0, width / 3, height); fill("red"); rect((width / 3) * 1, 0, width / 3, height); noFill(); rect((width / 3) * 2, 0, width / 3, height); } else { noFill(); rect((width / 3) * 0, 0, width / 3, height); rect((width / 3) * 1, 0, width / 3, height); fill("red"); rect((width / 3) * 2, 0, width / 3, height); }}