How do I make a game like star eliminate game by c2?

Hi,Friends! I'm thinking about how to make a game like objects eliminate ? i means.. there are many different color stars in an array.

when init game. generate an array on the screen. if there are three or maby four same color stars in neighbour,then you click or touch the same color stars ,they disappre!

and i don't have any ideas by using c2 . dose anyone have some ideas ? Thanks !

This how I did collapse puzzle game:

alextro Thanks a lot ,I will try it !