Simple bash spinner

spin.sh

function spin-wait() {
    spin="/-\|"
    echo -n "${1:-Press any key to continue...}  "
    while true
    do
        printf "\b${spin:i++%${#spin}:1}"
        read -n 1 -t 0.25 noop

        if [ "${?}" == "0" ]; then
            break
        fi
    done
}