void setup()
{
  size(800, 800);
  background(0);
}

void draw()
{
  star(width/2.0, height/2.0, color(0, 200, 255), 6, 300);
  star(width/3.0, height/3.0, color(100, 200, 155), 7, 100);
}

void star(float posx, float posy, color c, int numPts, float size)
{
  for (int i=0; i<numPts; i+=1) {
      float oldx, oldy, newx, newy;
      
      // compute end points
      oldx = posx + size * cos(radians(360.0/numPts*i));
      oldy = posy + size * sin(radians(360.0/numPts*i));
      newx = posx + size * cos(radians(360.0/numPts*(i+2)));
      newy = posy + size * sin(radians(360.0/numPts*(i+2)));
      
      // draw the line
      stroke(c);
      strokeWeight(5);
      line(oldx, oldy, newx, newy);
  }
}