SketchBook

function setup() {
createCanvas(windowWidth,
windowHeight);
background(300, 300, 300);
}

function draw() {
var from = color(10, 200, 255);
var to = color(255, 200, 150);

for (var i = 10.0; i < width; i = i + 70.30) {
for (var j = 10.0; j < height; j = j + 70.30) {
stroke(238);
fill(lerpColor(from, to, (i + j) / (width + height)));
rect(i, j, 50, 50);
}

}
}