# Help with Random Motion

**URL:** <https://forum.kirupa.com/t/help-with-random-motion/79810>\
**Category:** flash\
**Created:** [February 17, 2005, 4:26am UTC](https://forum.kirupa.com/t/help-with-random-motion/79810 "2005-02-17T04:26:25Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![denizengt](https://avatars.discourse-cdn.com/v4/letter/d/58f4c7/32.png) [@denizengt](https://forum.kirupa.com/u/denizengt)\
**Post date:** [February 17, 2005, 4:26am UTC](https://forum.kirupa.com/t/help-with-random-motion/79810/1 "2005-02-17T04:26:25Z")

</div>

Hey all, I’m a newbie to Flash and these forums.

I’ve been following Kirupa’s Random Motion tutorial, available here [http://www.kirupa.com/developer/actionscript/random\_motion.htm](http://www.kirupa.com/developer/actionscript/random_motion.htm)

I have managed to get it to work. However I wish to mask the effect. I have placed a mask, with my layer with the random motion elements underneath it. However the mask does not work.

If anyone has read or done that tutorial, can you suggest a reason why I cannot mask the motion?

Thankyou for any help.