progress bar in bash

show_bar

function show_bar() {
    local i=0;local p=1;local c=">"
        echo;echo
    while true;do
        local x=$(($(tput cols)-3));local y=$(($(tput lines)-2));i=$((i+1))
        [ $(($i%$x)) -eq 0 ] && {
            [ "$c" = ">" ] && c="<" || c=">"
        }
        [ "$c" = ">" ] && {
            p=$((p+1));[ "$p" -ge $x ] && p=$x
        }
        [ "$c" = "<" ] && {
            p=$((p-1));[ "$p" -le 1 ] && p=1
        }
        tput cup $y 1;for ((j=0;j<$x;j++ ));do echo -n "-";done
        tput cup $y $(($p)); echo -ne "\e[32;49;2m$c\e[0m"
        tput cup $y $((x+2)); sleep 0.2
    done
}


usage:
show_bar &
pid=$!
trap 'echo you hit Ctrl-C/Ctrl-\, now exiting..; kill $pid; exit' SIGINT SIGQUIT
echo sleep now
sleep 60
echo sleep done
kill $jawsp &>/dev/null