// globals
Graviton gravioli;

void setup(){
  size(200,200);
  background(0);
  gravioli = new Graviton(100,100); 
}

void draw(){
  background(0);
  gravioli.draw();
}

class Graviton{
  float x, y;
  float cnt, detail, radius, offset;
  // constructor
  Graviton(float xpos, float ypos){
    x = xpos;
    y = ypos;
    radius = width * 0.4;
    offset = width / 2;
    detail = 6.28 / 10000;
    cnt = random(-3.14, 3.14);
  }
 
  // called every refresh from main draw loop
  void draw(){
    this.move();
    stroke(255);
    point(x,y);
  }
 
  void move(){
    x = sin(cnt) * radius + offset;
    y = cos(cnt) * radius + offset;
    cnt = cnt + detail;
    if (cnt > 3.14){
      cnt = -3.14;
    }
  } 
}