class SnowFlake
{
  private float x, y;
  private float xspeed, yspeed;

  public SnowFlake()
  {
    Reset();
  }

  public void Reset()
  {
    this.x = rand() * SCREEN_WIDTH;
    this.y = 0;
    this.xspeed = rand() * 10.0 - 5.0;
    this.yspeed = 1.0 + rand() * 2.0;
  }


  public void Update()
  {
    this.x += this.xspeed;
    this.yspeed += this.yspeed;
    if (/* PARTICLE OUTSIDE SCREEN */)
      Seed();
  }

  public void Draw()
  {
    // Draw particle to screen somehow
  }
}


flakes = new SnowFlake[100];
for (int i=0;i<flakes.Count;i++)
   flakes[i] = new SnowFlake();


for(flake in flakes)
{
   flake.Update();
   flake.Draw();
   Sleep(10); // Slow down
}