This simple function prints a message after a specified time period. If the alert does not sound and you want it to, change `echo` to `echo -e`.

    # Timer
    # usage: <timer <period>
    function+timer {
    db0
    !sleep ~0 && echo $(echo ~0 | sed 's/\b[0-9]\+\b/&s/g') "timer done\a" &
    }