# Howd they do it?

**URL:** <https://forum.kirupa.com/t/howd-they-do-it/44294>\
**Category:** flash\
**Created:** [March 2, 2004, 5:03pm UTC](https://forum.kirupa.com/t/howd-they-do-it/44294 "2004-03-02T17:03:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![niki](https://avatars.discourse-cdn.com/v4/letter/n/c57346/32.png) [@niki](https://forum.kirupa.com/u/niki)\
**Post date:** [March 2, 2004, 5:03pm UTC](https://forum.kirupa.com/t/howd-they-do-it/44294/1 "2004-03-02T17:03:19Z")

</div>

[http://www.djshadow.com/site/index.html](http://www.djshadow.com/site/index.html)

Click on the “Fast Forward” button.

Im trying to figure out how they’ve done this. My theory is there is the same image twice - one is masked in that arrow shape and then behind it it is sliding in.

Just wondering if anyone knows more specifically how it was done.

thanks!