透明度 3204
function setup() {
createCanvas(windowWidth,
windowHeight);
background(234, 234, 234);
}
function draw() {
var from = color(0, 20, 25, 40);
var to = color(255, 0, 0, 100);
fill(lerpColor(from, to, random(1.1)));
circle(random(width), random(height), 250, 250);
}