#!/usr/dt/bin/dtksh

PATH=/bin

hour= min= unset hour min
hour=$(date +%H)
min=$(date +%M)
(( hour = ${hour#0} ))
(( min = ${min#0} ))

(( min >= 25 && min <= 35 )) && {
  audioplay /usr/demo/SOUND/sounds/gong.au
  exit 0
}

(( hour %= 12 )) || (( hour = 12 ))

i= unset i
for (( i = 1; i <= hour; i++ )); do
  audioplay /usr/demo/SOUND/sounds/cuckoo.au
  sleep 0.15
done