How to do this kind of animation?

programming flash
1

Hi!
I am struggling to make this effect (http://www.votorantim.com.br/votorantim/novamarca/_swf/index.html) with this image

http://www.djchambinho.com/logo.jpg

How would I do that?

2

Thank You…but how would I do this? is there any tutorial about something like this?Do I have to use mask?

3

You simply erase the completed drawing progressively, working backwards (every 5 frames, or so) along the timeline.
ie: the drawing then progressively “unerases” when the animation is played forward.

You can do this most effectively by isolating various parts of the drawing on layers.
Use the “custom easing tool” to generate a keyframe for every frame of the final animation.(smoother playback; tweens don’t work as well for stuff like this)