Mine

header() {        echo -en '\e[1;37m\e[40m'        echo -n "${1}"        i=0        while [ ${i} -lt $(($(tput cols) - $(echo ${1}|wc --chars) + 1 )) ]        do                        echo -en ' '                        i=$(( $i + 1))        done        echo -en '\e[0;49m\n'}