public void update(HRocket h1)
 {
     int i = 1;
     particles[0].update(h1);
     Console.WriteLine("Blah:" + particles[0].prevPosition);
     while (i < 15)
     {
         particles[i].update(particles[i-1]);
         i++;
     }
 }
 public void update(HRocket h1)
 {
     prevPosition = position;
     position = h1.prePosition;
 }