SketchBook

First

function setup() {
createCanvas(windowWidth,
              windowHeight);
 background(200, 0, 100);
frameRate(600);
}
function draw() {
fill(0, random(100, 255), random(200, 255), random(0, 255));
noStroke();
ellipse(random(0, width), random(0, width), random(1, 50));
}