processing.js sine example

// All Examples Written by Casey Reas and Ben Fry// unless otherwise stated.float spin = 0.0; float diameter = 84.0; float angle;float angle_rot; int rad_points = 90;void setup() {  size(200, 200);  noStroke();  smooth();}void draw() {   background(153);    translate(130, 65);    fill(255);  ellipse(0, 0, 16, 16);    angle_rot = 0;  fill(51);  for(int i=0; i<5; i++) {    pushMatrix();    rotate(angle_rot + -45);    ellipse(-116, 0, diameter, diameter);    popMatrix();    angle_rot += PI*2/5;  }  diameter = 34 * sin(angle) + 168;    angle += 0.02;  if (angle > TWO_PI) { angle = 0; }}