public static void AddBackAndForthTransform(GameObj obj, int frameDuration, int deltaX, int deltaY) { ITransform t = new LinearTransform(0, frameDuration, deltaX, deltaY); t.AutoReset = true; ITransform t2 = new LinearTransform(frameDuration + 1, frameDuration + 1 + frameDuration, -deltaX, -deltaY); t2.AutoReset = true; obj.AddTransform(t); obj.AddTransform(t2); }