Shell Programming and Scripting

if [ $REPLY = A ]
then

	echo -n "Enter the name of the folder to be backed up: "
	read dir_name

	until [ -d "$dir_name" ]
	do
		echo "Please enter a valid folder name : "
		read dir_name

	done


	echo -n "Enter the Directory name of where you would like it backed up to : "
	read dir_name2

	until [ -d "$dir_name2" ] 
	do 
		echo "Please enter a valid folder name : "
		read dir_name2
	done

	tar -cvf  $dir_name2
	echo "Your backup done"
	echo Would you like any further options? - choose Y or N
	read ANSWER

	while [ "$ANSWER" != Y -a "$ANSWER" != N ]
	do
		echo "You must enter Y or N - Try again "
		read ANSWER
	done
	if [ "$ANSWER" = Y ]

	then
		source script
	else
		exit
	fi

elif [ $REPLY = B ]
then
	echo   Enter the directory name of where the backup is located :
	read dir_name2

	until [ -d "$dir_name2" ]

	do 
		echo "Please enter a valid backup name : "
		read dir_name2
	done

	ls -al $dir_name2
	echo -n "Enter the File name to be restored : "
	read filename
	until  [ -f "$dir_name2/$filename" ]

	do 
		echo "Please enter a valid filename : "
		read filename
	done
	tar -vxf $dir_name2/$filename

if [ $REPLY = A ]
then

	echo -n "Enter the name of the folder to be backed up: "
	read dir_name

	until [ -d "$dir_name" ]
	do
		echo "Please enter a valid folder name : "
		read dir_name

	done



	echo -n "Enter the Directory name of where you would like it backed up to : "
	read dir_name2

	until [ -d "$dir_name2" ] 
	do 
		echo "Please enter a valid folder name : "
		read dir_name2
	done

	tar -cvf  $dir_name2/ $dir_name 
	echo "Backup Complete"
THE CODE BELOW SEEMS TO BE THE PART OF THE CODE THAT ISN'T WORKING
elif [ $REPLY = B ]
then
	echo   Enter the directory name of where the backup is located :
	read dir_name2

	until [ -d "$dir_name2" ]

	do 
		echo "Please enter a valid backup name : "
		read dir_name2
	done

	ls -al $dir_name2
	echo -n "Enter the File name to be restored : "
	read filename
	until  [ -f "$dir_name2/$filename" ]

	do 
		echo "Please enter a valid filename : "
		read filename
	done
	tar -vxf $dir_name2/$filename 
	echo "File Restored"