People have been asking how I made this, so I took some screen shots:

6. Tweened segment symbols layered and offset by 3 frames, in a new symbol. I build everything out of nested and layered symbols.

7. Convex and concave symbols layered, positioned and offset to make a snake. It is growing from right to left here.

8. A 68-frame section of the growing, moving snake is tweened left-to-right to remain in a stationary position while it waves.
I flipped the whole thing around and voila:
That’s a really great tutorial, Nina!
I love the motion guide technique and how you compensate the offset in the last step.
I’m so stuck into cycles ‘on the spot’, I would have probably tried to do it by just bouncing the symbols up and down and that would have been a dynamics disaster.
Hypnotic!
ps. Flash 8!!! Flash CS6 or CC2015 are just the same
Adobe have absolutely no idea what to do with the program.
It makes me so sad there are no opensource tools for this. :-/
Supergreat, still i’m not sure Flash is Macromedia’s anymore ! 😉
@Bast Macromedia made Flash when version 8 was released.