Sequential MovieClip Instances Playback

3 Movieclips(instance of each other) on stage named as follows

mcClip1, mcClip2, mcClip3

These clips are stopped on their first frame and contain the same animation on the next frame.

How do I start the first one and not play the others until the first one reaches a certain frame in its movieclip? And than not play the second one until it reaches the certain frame.