​

function setup() {

  createCanvas(600, 600);

  noLoop();

}

​

function draw() {

  background("#008C76FF");

  stroke("#9ED9CCFF");

  let row = 60;

  let col = 60

  let s = random(10,30);

  strokeWeight(3);

​

  //horizontals

  for (var r = 0; r < row; r++) {

    var rowRan = int(random(0,2));

    for(var c = 0; c < col; c++){

      if(c%2==rowRan) line(r*s,c*s,r*s,(c+1)*s);

    }

    var colRan = int(random(0,2));

    for(var c = 0; c < col; c++){

      if(c%2==colRan) line(c*s,r*s,(c+1)*s,r*s);

    }

  }

}

​

function mousePressed(){

  draw();

}

​

function keyPressed(){

  if (keyCode === DOWN_ARROW) {

    draw();

  }

}