wscript.echo pauses the script when run from wscript.
I added a bit of code on yours to force it to run in cscript console window I also added a chr(7) echo which is a beep and a 995 milisecond sleep between beeps.
You could try getting rid of the beep and changing the sleep to 1000 milliseconds(1 second).
Personally I would prefer do it in a HTA with a set.interval timer updating display