function setup() { 

  createCanvas(windowWidth, windowHeight);

    x = width*.5;

    y = height*.875;

    xInit = x;

    yInit = y;

} 

​

function draw() { 

  background(0);

​

    x-=0.33;

    y--;

​

    fill(0, 0, 255);

    ellipse(xInit, y, 10, 10);

    fill(255, 0, 0);

    ellipse(x, yInit, 10, 10);

    fill(255);

    ellipse(x, y, 20, 20);

}