public void ToStringTest()
{
var m = new Movement();
m.Appear(0, 0, 2, 0);
m.Appear(0, 0, 4, 1);
m.Appear(0, 0, 8, 2);
m.Disappear(3, 5, 0);
m.Move(4, 2, 4, 5, 1);
Console.WriteLine(m.ToString());
}