var time;



function setup() {

  createCanvas(windowWidth,

               windowHeight);

  noFill();

  strokeWeight(3);

  time = 0;

}



function draw() {

  background(150,220,200);



  for (var i = 0; i < 10; i = i + 1) {

    var ticktack = 1 + sin(time + i);

    stroke(0,i * (150 / 10),50 );

    strokeWeight(windowWidth / 100 * ticktack);

    ellipse(windowWidth / 2, windowHeight / 2, windowHeight / 10 * i);

  }



	

	

	

	

	

	for (var i = 0; i < 10; i = i + 1) {

    var ticktack = 1 + sin(time + i);

    stroke(0,i * (50 / 5),30 );

    strokeWeight(windowWidth / 10 * ticktack);

    ellipse(windowWidth / 2, windowHeight / 2, windowHeight / 5 * i);

  }

	

	

	

	

	

	

	

  time = time + 0.045;

}