HariesDesign.com This tutorials will explain about how make clouds animation, no script needed, it just simple step. Minimum Flash 8. It shown like this:
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Step 1
Create new document with dimention 350px X 350px
Step 2
import your photo collection
File > Import > Import to stage
Step 3
use align tools to make best position
Step 4
create new layer and name it with cloud, and then use brush tools to create cloud in left site ( out of main layer area )
Step 5
still layer selected, press F8 to convert with symbol, select movie clip types
Step 6
Still selected from Filter panel,select blur types
Step 7
Still same layer selected
Then from Properties panel, use alpha color
Now you get
Step 8
Create motion
Insert > Time line > Create Motion Tween
now move to frame 60 then press F8
Then move your cloud symbol to the right side, like this