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function setup() {
createCanvas(windowWidth, windowHeight);
}
function draw() {
background(0,0,0,random(90,100));
if (mouseY < windowHeight/2)
{
stroke(255, 255, 255);
strokeWeight(random(0,10))
fill(0,0,0,50)
ellipse(windowWidth/2,windowHeight/2,200,200);
stroke(255, 255, 0);
strokeWeight(random(0,10))
fill(0,0,0,50)
ellipse(windowWidth/2,windowHeight/2,200,200);
}
}