createCanvas(400, 400);

}

​

function draw() {

  background(100, 30, 20, 40);

​

  noStroke();

​

  var myOffset = height / 2;

  //  var myAmplitude = 100;

  var myFrequency = 1 / 2; //beats per second

  var myPhase = 0;

  var nPoints = 20

  var nRings = 4

​

  for (var j = 0; j < nRings; j++) {

    for (var i = 0; i < 3 * nPoints; i++) {

      var frac = i / nPoints; //0...1

      var myRadius = 60 * j + 50

      var rectY = myOffset + myRadius * sin(TWO_PI * (millis() / 1000.0) * myFrequency + myPhase);

      var rectX = myOffset + myRadius * cos(TWO_PI * (millis() / 1000.0) * myFrequency + myPhase);

      fill(i * 70, j * 70, 100);

      rectMode(CENTER);

​

      line(0, myOffset, width, myOffset);

      //circle(rectX, rectY, 50);

      //rect(rectX, rectY, i, j + 30, j+20, j+15, j+60);

      rect(rectX, rectY, 50, 50, 50, 50);

    }

  }

}