# Actionscript mask

**URL:** <https://forum.kirupa.com/t/actionscript-mask/232629>\
**Category:** flash\
**Created:** [July 16, 2007, 3:46pm UTC](https://forum.kirupa.com/t/actionscript-mask/232629 "2007-07-16T15:46:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tattered](https://avatars.discourse-cdn.com/v4/letter/t/b9e5f3/32.png) [@Tattered](https://forum.kirupa.com/u/Tattered)\
**Post date:** [July 16, 2007, 3:46pm UTC](https://forum.kirupa.com/t/actionscript-mask/232629/1 "2007-07-16T15:46:25Z")

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Hello people,

I have created a mask using actionscript, but I found that it will only mask over graphic/movieclip/etc… am I doing something wrong here?

```auto

this.createEmptyMovieClip("mask_mc", this.getNextHighestDepth());
mask_mc.beginFill(0xFF0000);
mask_mc.moveTo(0, 0);
mask_mc.lineTo(550, 0);
mask_mc.lineTo(550, 400);
mask_mc.lineTo(0, 400);
mask_mc.lineTo(0, 0);
mask_mc.endFill();
//
bg_mc.setMask(mask_mc);
a_mc.setMask(mask_mc);

```

This will only mask “a\_mc” movieclip.