Super lightweight pomodoro timer script, modified for Mac from https://github.com/sayanarijit/pomo. Just copy/paste into your `.bashrc` or equivalent.

pomo.sh

# pomodoro timer (pomo <minutes> <message>)

function pomo() {
    arg1=$1
    shift
    args="$*"

    min=${arg1:?Example: pomo 15 Take a break}
    sec=$((min * 60))
    msg="${args:?Example: pomo 15 Take a break}"

    for ((sec=min*60; sec>0; sec--)); do
        ((sec_left=sec%60))
        ((min_left=sec/60))
        printf "%02d:%02d\r" $min_left $sec_left
        sleep 1
    done

    printf "\n"

    afplay /System/Library/Sounds/Glass.aiff && printf "$msg"
    # say "$msg" # Uncomment this line to speak custom message instead of playing Glass.aiff
}