Shell Programming and Scripting

amixer -D pulse sset Master 30% > /dev/null 2>&1  
cvlc --play-and-exit /usr/share/sounds/My_Sounds/Alarm-sound-buzzer.mp3 > /dev/null 2>&1  
echo 'TIME IS UP.' gxmessage -fg blue -font  'sans 20' -timeout 2 ' TIME IS UP !!'

# bump.shl
# increase volume by 5% every half second - in background
 for (( i=0 i<5; i++))
 do
  amixer sset Master 5%+
  sleep 500m
done

amixer -D pulse sset Master 15% > /dev/null 2>&1  
# call child process
/path/to/bump.shl &
pid=$!
cvlc --play-and-exit /usr/share/sounds/My_Sounds/Alarm-sound-buzzer.mp3 > /dev/null 2>&1  
echo 'TIME IS UP.' gxmessage -fg blue -font  'sans 20' -timeout 2 ' TIME IS UP !!'
# clean up child if needed
kill -0 $pid && kill $pid
wait

andy@7_~/Downloads$ t1.sh 5
/home/andy/bin/t1.sh: line 9: /home/andy/bin/bump.shl: Permission denied
/home/andy/bin/t1.sh: line 14: kill: (3024) - No such process