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var xPos = [100,200,300];
var yPos = [20,80,50];
function setup() {
createCanvas(400, 400);
}
function draw() {
background(0);
fill(0,0,255)
var i= 0;
while (i < xPos.length){
ellipse(xPos[i],yPos[i],30,30)
yPos[i]++;
if(yPos[i]>430){
yPos[i]=0;
}
i++; //i= i + 1;
}
}