AddsAndSubs.MainScreen.NextOperation C# (CSharp) Method

        private void NextOperation()
        {
            currentOperation++;

            // Focus the operation at index 1
            if (currentOperation == 1)
            {
                opAnimations[1].Play(operations[0]);
                opAnimations[2].Play(operations[1]);
                opAnimations[3].Play(operations[2]);

                operations[3].Visible = true;
                operations[3].Position = new Vector2(0, 589);
            }
            // Focus the operation at index currentOperation
            else if (currentOperation > 1 && currentOperation < operations.Length - 2)
            {
                opAnimations[0].Play(operations[currentOperation - 2]);
                opAnimations[1].Play(operations[currentOperation - 1]);
                opAnimations[2].Play(operations[currentOperation]);
                opAnimations[3].Play(operations[currentOperation + 1]);

                //animations[3].EndEvent += new Animation.AnimationHandler(MatePlusAddAndSubScreen_EndEvent);

                operations[currentOperation + 2].Visible = true;
                operations[currentOperation + 2].Position = new Vector2(0, 589);
            }
            // Focus the operation just before the last one
            else if (currentOperation == operations.Length - 2)
            {
                opAnimations[0].Play(operations[currentOperation - 2]);
                opAnimations[1].Play(operations[currentOperation - 1]);
                opAnimations[2].Play(operations[currentOperation]);
                opAnimations[3].Play(operations[currentOperation + 1]);

                //animations[3].EndEvent += new Animation.AnimationHandler(MatePlusAddAndSubScreen_EndEvent);
            }
            // Focus the last operation
            else if (currentOperation == operations.Length - 1)
            {
                opAnimations[0].Play(operations[currentOperation - 2]);
                opAnimations[1].Play(operations[currentOperation - 1]);
                opAnimations[2].Play(operations[currentOperation]);

                //animations[2].EndEvent += new Animation.AnimationHandler(MatePlusAddAndSubScreen_EndEvent);
            }
            // The end, no more operations
            else
            {
                opAnimations[0].Play(operations[currentOperation - 2]);
                opAnimations[1].Play(operations[currentOperation - 1]);
            }
        }