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function setup() {
createCanvas(750, 750);
background(0);
}
function draw() {
background(136, 0, 255, 1);
stroke(255, 150, 0);
fill(255, 255, 255, 100);
translate(mouseX, mouseY);
rotate(millis()/100);
rectMode(CENTER);
ellipse(25, 25, 130, 170);
}