function rotate_line
{
INTERVAL=1  # Sleep time between "twirls"
TCOUNT="0"  # For each TCOUNT the line twirls one increment

while :     # Loop forever. . .until this function is killed
do
    TCOUNT=`expr $TCOUNT + 1`  # Increment the TCOUNT

    case $TCOUNT in
    "1") echo .-."\b\c"
         sleep $INTERVAL
         ;;
    "2") echo .\\."\b\c"
         sleep $INTERVAL
         ;;
    "3") echo "|\b\c"
         sleep $INTERVAL
         ;;
    "4") echo "/\b\c"
         sleep $INTERVAL
         ;;
      *) TCOUNT="0" ;; # Reset the TCOUNT to "0", zero.
    esac
done
}