# Random moving clip that also function as a mask

**URL:** <https://forum.kirupa.com/t/random-moving-clip-that-also-function-as-a-mask/298029>\
**Category:** Uncategorized\
**Created:** [October 12, 2009, 9:53pm UTC](https://forum.kirupa.com/t/random-moving-clip-that-also-function-as-a-mask/298029 "2009-10-12T21:53:53Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dboers](https://avatars.discourse-cdn.com/v4/letter/d/bbe5ce/32.png) [@dboers](https://forum.kirupa.com/u/dboers)\
**Post date:** [October 12, 2009, 9:53pm UTC](https://forum.kirupa.com/t/random-moving-clip-that-also-function-as-a-mask/298029/1 "2009-10-12T21:53:53Z")

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Hi Guys and girls, I’m looking for a function for a random moving clip (devined x position) with lets say 5 secons interval, that is also functioning as a mask. But the clips that need to be masked should change in opacity in stead of vissible or not vissible. Anyone any ideas?