#!/bin/bash

function echotime ()
{
   TIMEUSED="$1"
   if ((TIMEUSED > 86400 ));then
    DAYSUSED=$((TIMEUSED / 86400))
    HOURSUSED=$((TIMEUSED/3600-DAYSUSED*24))
    MINUTESUSED=$((TIMEUSED/60-HOURSUSED*60-DAYSUSED*60*24))
    SECONDSUSED=$((TIMEUSED-MINUTESUSED*60-HOURSUSED*3600-DAYSUSED*3600*24))
    OUTPUT="$DAYSUSED d $HOURSUSED h $MINUTESUSED m $SECONDSUSED s"
   elif ((TIMEUSED < 60 ));then
    OUTPUT="$TIMEUSED s"
   elif ((TIMEUSED < 3600));then
    MINUTESUSED=$((TIMEUSED/60))
    SECONDSUSED=$((TIMEUSED-MINUTESUSED*60))
    OUTPUT="$MINUTESUSED m $SECONDSUSED s"
   elif ((TIMEUSED < 86400));then
    HOURSUSED=$((TIMEUSED/3600))
    MINUTESUSED=$((TIMEUSED/60-HOURSUSED*60))
    SECONDSUSED=$((TIMEUSED-MINUTESUSED*60-HOURSUSED*3600))
    OUTPUT="$HOURSUSED h $MINUTESUSED m $SECONDSUSED s"
   fi
   echo "$OUTPUT"
}



NEWYEAR="$(date -d '01 jan 2006 00:00 CET' +%s)"


while usleep 200; do
    ACTUALTIME="$(date +%s)"

    REMAIN=$((NEWYEAR - ACTUALTIME))
    REMAINHUMAN="$(echotime "$REMAIN")"
    printf "New year countdown: %s     \r" "$REMAINHUMAN"
done