Simple Circle Movement using sin/cos

float numberofCircles = 15; 

float angle = radians (360 / numberofCircles);

float distance = 150;

float offset = radians (90);

float circWidth, counter;

​

void setup() {

  size (400, 400);

  circWidth = 10;

  counter = -0.001;

}

​

void draw () {

  //fill (random(255));

  for (int i = 1; i <= numberofCircles; i++) {

    float x = cos(angle *i + offset) * distance + width/2;

    float y = sin(angle *i + offset) * distance + height/2;

    ellipse (x, y, circWidth, circWidth);

  }

  offset = offset + counter;

}