Limit Effect Display

How to limit effect displayed on screen.
In real arcade game, when you hit buttons more than 4 buttons and first buttons effect playing, Game will hide first effect and play last effect. The effect will not more than 4 in same time.
Like this : (https://www.youtube.com/watch?v=6cyMiy1PQ4o)
Look at slide effect, It's good sample.
Help me please...
作成日時:2017-03-25 20:17:01 更新日時:2017-03-25 20:17:01