# Opacity/Alpha Decreases faster than Increases

**URL:** <https://forum.kirupa.com/t/opacity-alpha-decreases-faster-than-increases/330855>\
**Category:** flash\
**Created:** [March 29, 2013, 9:49pm UTC](https://forum.kirupa.com/t/opacity-alpha-decreases-faster-than-increases/330855 "2013-03-29T21:49:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SoupHead](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@SoupHead](https://forum.kirupa.com/u/SoupHead)\
**Post date:** [March 29, 2013, 9:49pm UTC](https://forum.kirupa.com/t/opacity-alpha-decreases-faster-than-increases/330855/1 "2013-03-29T21:49:56Z")

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## This is kind of an odd problem. I’m working on a project for the Blue Circles contest and I have the following code in one section:

## if (c.\_x \> midX) { c.\_alpha += opacityRate; } else { c.\_alpha -= opacityRate; }

midX = the middle of the screen  
opacityRate = 1 (for now)

Anyway, the circles move across the screen, back and forth. On one side of the screen they have increasing .\_alpha and on the other they have a decreasing .\_alpha. After, a few full movements across the screen (10 or so), it is visible that the overall .\_alpha is constantly going lower. I have also used trace(c.\_alpha); to check the values. The values go into the negatives more and more each rotation. Is this just a thing that Flash does, or am I going insane?  
EDIT: I just realized I forgot to specify that this is the only place in my program where I do anything with or manipulate the .\_alpha property.

Thank you,  
SoupHead