A little sleeper function in bash to replace native sleep command with some progress output

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This is a small function I wrote (which I call sleeper), that I use in some of my bash scripts when there is a sleep for XX seconds, and I want to know how many seconds passed:

#!/bin/bash

interval=1
while [ "$interval" -lt 120 ] ; do
  echo -ne "$interval\r"
  sleep 1
  let "interval=$interval + 1"
done

I also have it here: http://pastebin.com/C4vweaUu

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