public static Coords BelowLeft(this Coords coords)
 {
     return Coords.Create(coords.LeftOfX(), coords.BelowY());
 }
 public static Coords BelowRight(this Coords coords)
 {
     return Coords.Create(coords.RightOfX(), coords.BelowY());
 }
 public static Coords Below(this Coords coords)
 {
     return Coords.Create(coords.X, coords.BelowY());
 }