ugly, rewrite it

#!/bin/bashfunction 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