​

function setup() {

  createCanvas(400, 400);

  background(255, 89, 123);

  r = random(255); // range: 0~255

  g = random(255);

  b = random(255);

}

​

function draw() {

  if(mouseIsPressed){

    stroke(r,g,b);

    strokeWeight(random(10));

    line(pmouseX,pmouseY,mouseX,mouseY);

     }

}