fancy right-aligned countdown

#!/bin/bash
function right-aligned() {
        SPC=$(expr $(tput cols) - ${#1})
        for (( j=1; j<=$SPC; j++ )); do
                echo -n " ";
        done;
        echo -n ${1}
}

function fancy-timer() {
                for (( i=1; i<=$1; i++ )); do
                        SEC=$(expr ${1} - $(expr ${i} - 1))
                        SECW="second"
                        if [ "$SEC" -ne "1" ]; then
                                SECW="${SECW}s"
                        fi
                        echo -ne "$(right-aligned "${2} ${SEC} ${SECW}")\r"
                        sleep 1
                done;
}

# fancy-timer 10 "This example timer will end in"
# echo ""