Flash Frame-By-Frame Animation: Detailed Animation Part II

Now shift to your next level of keyframing, and sketch the frame at the midpoint between your first frame and your midpoint. You're going to find that this takes you longer than your original rough sketches did, although this still isn't the final detail work and isn't expected to be perfect; you'll still want to spend a bit more time on it, and try for a bit more accuracy. The good thing is that if it slips up a little bit, if one line is a tiny bit off in one frame, it won't be too noticeable because it will be moving too fast.