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function setup() {
createCanvas(500, 500);
background("black");
for (var i=1;i<5;i++){
for (var j=1;j<5;j++){
for (var k=5;k>0;k--){
stroke("red")
strokeWeight(4)
fill("white")
ellipse(100*i,100*j,15*k,15*k)
}
}
}
}