Bash Scripting: redirecting input file descriptors

#!/bin/bash
#
#
#
exec 6<&0
exec 0<~/sandbox/scripts/data.d/states1
count=1
while read line
do
        echo "Line #$count: $line"
        count=$[ $count + 1 ]
done
exec 0<&6
read -p "Are you done now?" answer
case "$answer" in
        Y | y)echo "Goodbye" ;;
        N | n)echo "Sorry, this is the end" ;;
esac