Simple Lissajous Curve

float num = 50;

float counter = 0.01;

​

int x, y;

​

void setup () {

  size (500, 500);

  smooth();

  background (255);

  x = width/2;

  y = height/2;

}

​

void draw () {

  // lissajous curve 

  noStroke();

  // Blue Curve

  fill (0, 255, 255, 10);

  ellipse (x + (cos(num*2) *40), (y - 50) + (sin(num*8)*50), 10, 10);

  // Red Curve

  fill (255, 0, 0, 10);

  ellipse (x + (cos(num*4) *30), (y + 70) + (sin(num)*50), 10, 10);

​

  // make a yellow circle 

  fill (255, 255, 0);

  ellipse (x + (cos(num) * 150), y + (sin(num) * 150), 5, 5);

  num = num + counter;

}