This effect created by using Motion Tween and Key Frame animation.Let's see how to make it
- Create new Graphic Symbol using (Crtl+F8) .Name it as S1.Draw image like below image
- Create new Movieclip using Modify->coverttosymbol or press F8 .Name it as smoke1
- Drag and drop S1 (Graphic which created in step1) from library in to the new movieclip.
- Drag and put as many as lines you want like below image.
- Create one more layer , and drag and drop the movieclip called "smoke" .
- Click this mc and open properties window , Window->Properties and set the alpha value to 10%
- Create new Layer called "Mask Layer" draw one rectangle mask over the smoke lines. Right click this Layer and make it as Mask Layer.
- Now give ctrl+Enter to run the player.