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LabVIEW
While loop stops before countdown has finished
Solved!
The code I showed you was not designed to be paused since the Express VI doesn't have that capability. You can use a second shift register to keep track of the elapsed time. This is a pretty simple change. Try it. 
If you're going to make this program any more complicated, then I suggest looking into creating a state machine, as previously mentioned. Application Design Patterns: State Machines
Also, why did you remove the Decrement function after the Array Size? There was a reason why it was there.
