# Draggable Masks

**URL:** <https://forum.kirupa.com/t/draggable-masks/9478>\
**Category:** flash\
**Created:** [December 12, 2002, 4:23pm UTC](https://forum.kirupa.com/t/draggable-masks/9478 "2002-12-12T16:23:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![xcleetusx](https://avatars.discourse-cdn.com/v4/letter/x/e274bd/32.png) [@xcleetusx](https://forum.kirupa.com/u/xcleetusx)\
**Post date:** [December 12, 2002, 4:23pm UTC](https://forum.kirupa.com/t/draggable-masks/9478/1 "2002-12-12T16:23:32Z")

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I’m trying to create three circles on the stage, one red one green, one blue. When Red overlaps blue, I want the overlapped area to be magenta. When blue overlaps green, the overlapped area should by Cyan. When red&green, it should be yellow, and when all 3 mix it should be white.

How do I create the color effect. Right now I have the overlap constraints working and a simple TRACE outputting the color. I need to know how to create the color effect when they mix.

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [December 13, 2002, 3:20am UTC](https://forum.kirupa.com/t/draggable-masks/9478/2 "2002-12-13T03:20:02Z")

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You could try to set the alpha to 50, for instance. But what does it have to do with draggable masks?

pom :-\