Very easy to do. Load up any level, Quick Game/Classic/Level 1 is as good as any, let a row or two of blocks build up, then tap a group (3 or more) of the three colors (red, blue, yellow) in quick succession. Should be the first achievement you earn.
Note: Fob Upset has brought it to my attention that there's an occasional bug that will cause the achievement to pop repeatedly, but you still wont earn it. In order to resolve this just uninstall then reinstall the game, and it should pop for you.