埋め尽くす
function setup() {
createCanvas(windowWidth,
windowHeight);
background(300, 300, 300);
}
function draw() {
var from = color(64, 64, 64, 3);
var to = color(128, 128, 128, 300);
var to = color(64, 64, 64, 260);
var from = color(64, 64, 64, 3);
stroke(300, 100);
fill(lerpColor(from, to, random(0.8)));
rect(random(width), random(height), 40, 40);
rect(random(width), random(height), 60, 60);
}