# onTweenComplete function...any way to trigger something half-way through a tween?

**URL:** https://forum.kirupa.com/t/ontweencomplete-function-any-way-to-trigger-something-half-way-through-a-tween/246357
**Category:** Uncategorized
**Created:** [December 10, 2007, 2:51pm UTC](https://forum.kirupa.com/t/ontweencomplete-function-any-way-to-trigger-something-half-way-through-a-tween/246357 "2007-12-10T14:51:47Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![jpixel](https://avatars.discourse-cdn.com/v4/letter/j/5fc32e/32.png) [@jpixel](https://forum.kirupa.com/u/jpixel)
#### Post date: [December 10, 2007, 2:51pm UTC](https://forum.kirupa.com/t/ontweencomplete-function-any-way-to-trigger-something-half-way-through-a-tween/246357/1 "2007-12-10T14:51:47Z")

</div>

Hi

I have two boxes. Box 1 moves down the page and Box 2 up the page. I can get it so, after box 1 has moved down and reached its destination, box 2 is then triggered and starts its tween up the page. I am using MC Tween and onTweenComplete();

easy enough

But I would like box 2 to start moving, half way through box 1’s tween, so when the tween is only 50% complete…any ideas on doing this???

how can I constantly keep track of box1’s position? So a value is being returned like every millisecond to see if it has passed, say .\_y\>100…any ideas??? thanks