#!/bin/sh
start_time_sec=$( date +'%s' )
HOME=$(tput cup 0 0)
ED=$(tput ed)
EL=$(tput el)
printf '%s%s' "$HOME" "$ED"

cleanup(){
	tput cnorm
	exit
}
trap cleanup INT


tput civis
while true
do
      diff=$(( $(date +'%s') - start_time_sec ))
    ROWS=$(tput lines)
    COLS=$(tput cols)
    date --date "@$diff" +'%M:%S' | head -n $ROWS | while IFS= read LINE; do
        printf '%-*.*s%s\n' $COLS $COLS "$LINE" "$EL"
    done
    printf '%s%s' "$ED" "$HOME"
    sleep 0.1
done
tput cnorm
