function setup() {
createCanvas(windowWidth,
windowHeight);
background(0,0,0,100);
}
function draw() {
var from = color(00, 210, 100, 50);
var to = color(50, 250, 0, 0);
stroke(10, 30);
fill(lerpColor(from, to, random(2.0)));
rect(random(width), random(height), 50, 30);
}