How do I Test Number Of Collisions

EDIT: Posted an swf to show what I need https://dl.dropboxusercontent.com/u/1306951/col_dec.swf

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This may be a simple questions, I need some clarification though.

How do you test number of instances of one sprite colliding with an instance of another sprite?

First step is understandable

sprite A collide sprite B 
=>Add 1 to collisions.[/code:1n5bqsc5]
Second is a bit unclear.
[code:1n5bqsc5]sprite A not overlapping sprite B
Trigger Once
=> Subtract 1 from collisions[/code:1n5bqsc5] 
It's not really what I need.

Anyone got a smarter approach?

Possibly but first can you elaborate more on what your trying to accomplish cause your question "How do you test number of instances of one sprite colliding with an instance of another sprite?" would be successful with your first expression "sprite A collide sprite B

=>Add 1 to collisions."

so what is it your wanting to do when they are overlapping???

Eeeerhm, detect how many collisions happen?

is this what you are looking for

Nothing like that but it's a very interesting capx, thanks! <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">

I think I should add some pictures or animations for better understanding in future, so here's a small swf animation to make things clear. https://dl.dropboxusercontent.com/u/1306951/col_dec.swf

Pick the A's that are overlapping B and then check A.PickedCount to see how many there are.

And it's important to note that if there are multiple B's in a single layout, you'll have to do a "for each B" to get the number of collisions of each one of them.

Wow that's some neat advice, I owe you many thanks guys!