!/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