let colors=[];

​

function setup () {

    createCanvas(windowWidth,windowHeight);

    noLoop();

    noFill();

    noStroke();

    colors = [

                        color(118,12,232),      //magenta

                        color(239,0,52),            //red

                        color(2,151,106),       //green

                        color(246,194,3),       //yellow

                        color(255,148,165),     //pink

                        color(222,222,222),     //gray

                    ]

    drawGrid(0,0, width, height, true);

}

​

function draw() {}

​

function drill(){

    return random()>0.5;

}

​

function getColor(repeat){

    return random( colors );

}

​

function drawGrid(x, y, w, h, dig, depth){

    depth = depth || 0;

​

    let split = random([2,3,4]);

    let w2 = (w / random([1,split]));

    let h2 = (h / random([1,split]));

    for(let x1=0; x1 < w; x1 += w2){

        for(let y1=0; y1 < h; y1 += h2){

            if(dig && depth < maxDepth){

                drawGrid(x+x1, y+y1, w2,h2, drill(), ++depth);

            }else{

                drawCell(   x+x1, y+y1, w2, h2)

            }

        }

    }   

}

​

​

function drawCell(x,y,w,h){

        let r = getColor();

        let c = getColor();

        push()

        fill( r );

        rect(x,y,w,h);

        while( r == c ){

            c = getColor();

        }

        pop();

}

​

function windowResized () {

  resizeCanvas(windowWidth, windowHeight);

}