#!/bin/sh

font=mono9

help(){
    echo "USO: $0 <tiempo_en_minutos>"
    echo "Ejemplo: $0 5"
}

if [ -z "$1" ]; then
    help 1>&2
    exit 1
fi

for t in $(seq "$1" -1 2); do
    cad=$(
        clear
        printf "Volvemos en\n%02d minutos" "$t" |
            toilet -f $font |
            cowsay -n |
            lolcat -f
        )
    printf "%s\n" "$cad"
    sleep 60
done

for t in $(seq 60 -1 0); do
    cad=$(
        clear
        printf "Volvemos en\n%02ds!!" "$t" |
            toilet -f $font |
            cowsay -n |
            lolcat -f
        )
    printf "%s\n" "$cad"
    sleep 1
done