Processing Evolved

    function setup() {
        let canvas = createCanvas(600, 600, WEBGL);
        canvas.parent('animation-holder');
    resizeAnimation();
    resizeAnimation();
    resizeAnimation();
    resizeAnimation();
    resizeAnimation();
    }

    function draw() {
        background(150);
        rotateX(frameCount * 0.01);
        rotateY(frameCount * 0.02);
        rotateZ(frameCount * 0.03);
        for (let x = -200; x <= 200; x += 100) {
            for (let y = -200; y <= 200; y += 100) {
                for (let z = -200; z <= 200; z += 100) {
                    push();
                    translate(x, y, z);
                    let colorValue = map(z, -200, 200, 0, 255 * 6);
                    let colorChoice = floor(random(10));
                    switch (colorChoice) {
                        case 0:
                            fill(255, 0, 0);
                            break;
                        case 1:
                            fill(0, 255, 0);
                            break;
                        case 2:
                            fill(0, 0, 255);
                            break;
                        case 3:
                            fill(255, 255, 0);
                            break;
                        case 4:
                            fill(255, 0, 255);
                            break;
                        case 5:
                            fill(0, 255, 255);
                            break;
                        case 6:
                            fill(255, 128, 0);
                            break;
                        case 7:
                            fill(128, 0, 255);
                            break;
                        case 8:
                            fill(0, 128, 255);
                            break;
                        case 9:
                            fill(128, 128, 0);
                            break;
                    }
                    box(50);
                    pop();
                }
            }
        }
    }