# Create Mask that

**URL:** <https://forum.kirupa.com/t/create-mask-that/237158>\
**Category:** Uncategorized\
**Created:** [August 27, 2007, 7:03pm UTC](https://forum.kirupa.com/t/create-mask-that/237158 "2007-08-27T19:03:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![azerus](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@azerus](https://forum.kirupa.com/u/azerus)\
**Post date:** [August 27, 2007, 7:03pm UTC](https://forum.kirupa.com/t/create-mask-that/237158/1 "2007-08-27T19:03:49Z")

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This has been bugging me for a while now, I’m not an expert in flash but at the same time not a beginner. I’m trying to create an effective mask to reveal something w/o the standard left to right motion. For instance, I’m basically taking a circle, and revealing it over time from 12 o’clock around and around to 12 oclock again. The only way I’ve managed to do this is with a very sloppy shape tween. I’m assuming there is an easier way? Other than keyframeing every frame?

any help would be greatly appreciated,

thanks