Variant on "first app" - gym timer, in binary

I've tweaked the example first app for something else that I wanted/needed - a 3 minute timer for my rest periods in the gym. Except I did it in binary for nerd cred and a random FB chat I was involved in.

JS file attached, MIT licence as usual.

• I think I've not got the button-press for reset registered entirely correctly, but putting that line anywhere else in the code made it not reset on countdown & out of time
  
• next step would be throwing the reset time into the settings app - can anyone point me at the documentation for hooking up with settings? I'm failing at site navigtion.
  

1 Attachment

• binaryGymClock.app.js