Un sencillo timer en bash

bashtimer

#!/bin/sh
# vim: ts=3 sw=3 sts=3 et si ai:

# (c) 2018, Andres Aquino <inbox@andresaquino.sh>
# This file is licensed under the BSD License version 3 or later.
# See the LICENSE file.

trap "exit 0" SIGINT SIGTERM
ccount=0
while(true); do
   etime=$(date '+%H%Mµ%S')
   toilet -f smmono9 "${etime}: time's up."
   utimer -t ${1}
   ccount=$((${ccount}+1))
   if [ ${ccount} -eq 4 ]; then
      clear
      ccount=0
   fi
done