Break Time is a simple shell script that's help you remember to take breaks away from your computer.

breaktime.sh

#!/bin/bash

# Visit Github:
# https://github.com/variadico/noti

# Install latest:
# go get -u github.com/variadico/noti/cmd/noti

# On macOS:
# brew install noti

usage(){
    echo "BreakTime Shell Script."
    echo
    echo "Break Time is a simple utility that's help you remember to take breaks away from your computer." 
    echo
	echo "Usage: $0 break time in minutes" 
    echo 
    echo "Arguments:"
    echo "-m                Short period focus (minutes)"
    echo "-b                Short break (minutes)"
    echo 
    echo "Example:" 
    echo "$0 -m 20 -b 4      Runs for 20 minutes short period focus and 4 minutes break."
    echo
	exit 1
}

readonly -f usage
# Invoke  usage function if arguments were not supplied
if [[ $# -eq 0 ]] 
then
    usage
fi

# Must have all arguments
if [[ $# -ne 4 ]]
then 
    usage
fi

# Counter, mapping minutes
break_count_minutes=0
# Time for short period focus
total_breaks_minutes=25
# Break time  
break_time_minutes=5

# Parsing arguments
while [ $# -ge 1 ];
do
    case "$1" in
       --)
        # No more arguments left.
        shift
        break
        ;;

      -m) 
        # Time for short period focus
        total_breaks_minutes="$2"; 
        shift 
        ;;
    
      -b)
        # Break time  
        break_time_minutes="$2"; 
        shift
        ;;

      -h|--help) 
        usage; 
        exit 0
        ;;

      *)
        # Unknown argument, print usage and exit
        usage;
        exit 0
        ;;
    esac
    # Consume argument, pass to the next one
    shift
done

# Print variables
echo "[ ${total_breaks_minutes} minutes short period focus for ${break_time_minutes} minutes break...]"
echo "[ Hit CTRL+C to Stop ]"
echo

# Infinite loop
while true; do
    if [[ ${break_count_minutes} -eq ${total_breaks_minutes} ]]
    then
        # Take a break
        echo "> Hi, Break Time for ${break_time_minutes} minutes..."
        /usr/local/bin/noti -t "Break Time" -m "You have to rest"

        # Reset counter to zero
        break_count_minutes=0

        # Break
        /bin/sleep $((${break_time_minutes} * 60))

        # Return to work
        echo "> Hey, return to work now."
        /usr/local/bin/noti -t "Break Time" -m "Return to your code"

        echo
    fi

    /bin/sleep 60

    # Track time
    ((break_count_minutes=break_count_minutes+1))

# End loop
done