if (N == 0) {

    let sw = 10; //this is the stroke width for the rectangle's border

    let alpha = 255;

    let c = [[255,0,0,alpha], [0,0,255,alpha], [0,255,255,alpha], [255,255,0,alpha] ];

    c = [[46,49,120,alpha],[50, 103, 115,alpha], [143, 140, 140,alpha], [164, 191, 63,alpha], [242, 160, 61,alpha] ,[242, 80, 65,alpha],[48,37,41,alpha],[232,174,138,alpha]];

    fill(c[int(random(c.length))]);

​

    stroke(0,0,0,alpha);

//    noStroke();

    strokeWeight(sw);

    rect (x0, y0, x1-x0, y1-y0);

  } else {

    let i = int(random(x0, x1)); //Pick a random x coordinate inside the current rectangle

    let j = int(random(y0, y1)); //Pick a random y coordinate inside the current rectangle

    piet(x0, y0, i, j, N-1); // Recurse on upper left rectangle

    piet(i, y0, x1, j, N-1); // Recurse on upper right rectangle

    piet(x0, j, i, y1, N-1); // Recurse on lower left rectangle

    piet(i, j, x1, y1, N-1); // Recurse on lower right rectangle

  }  

}

​

function setup() {

    createCanvas(windowWidth, windowHeight);

   drawingContext.shadowOffsetX = 1;

  drawingContext.shadowOffsetY = -1;

  drawingContext.shadowBlur = 5;

  drawingContext.shadowColor = color(0,0,0,50);

​

  piet(0,0,width,height,2);

}

​

function draw() {

//  background(255,255,255,10);

//  piet(0,0,width,height,4);

}

​

function keyPressed()

{

  if( key == 's' ){

    save("output.png");

  }

}