Pebble App Dev, Screen going Blank at the same time in the program each time

I have a simple timer that I coded for my pebble in Pebble.js that buzzes at increments that I use for sail boat racing. For some reason the number on the screen just disappear. I am baffled because when I run the timer from three minutes the numbers disapear but when I run the time from one minute it works fine. Is there a bug in my code or is this a bug with Pebble.js

Here is the code...

http://ift.tt/1By8Hnk

Here is the CloudPebble!

http://ift.tt/1CN7Fpj

Im not sure if the cloudpebble will be acessable becuase i'm not sure how to make it avaalible to everyone.

Thank You for your help in advance.