public Ball(int x, int y, int r, BallEnvironment e)
{
this.posx = x;
this.posy = y;
this.radius = r;
this.color = "#fafafa";
this.parent = e;
}
public RedBall(int x, int y, int r, BallEnvironment e) : base(x, y, r, e)
{
this.color = "#AA3939";
this.radius = 3;
}