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var x = 200
var y = 200
function setup() {
createCanvas(400, 400);
frameRate(5);
}
function draw() {
background(0,0,0,5);
var dir = int(random(4));
if(dir === 0){
x = x+20;
}
else if (dir === 1){
x = x-20
}
else if (dir === 2){
y = y+20
}
else if (dir === 3){
y = y-20
}
ellipse(x,y,20,20);
}