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function setup() { createCanvas(400, 400);}function draw() { background(220); noFill(); for (i = 50; i < 300; i += 50){ circle(200, 200, i); } rectMode(CENTER); if (mouseX < width / 4) { fill(255, 150); } else if (mouseX < (width / 4) * 3) { fill(127, 150); } else { fill(0, 150); } square(width / 2, height / 2, 300);}