fitim shabani's questions

I need to create a script for school but it doesn't seem to work,

#!/bin/bash

echo "hoeveel vakken heb jij deze periode?"
read $AANTAL


if [ -d "/home/school/jaar_1/periode_4" ];

then
    echo "directoy bestaat al."

else

    mkdir -p /home/school/jaar_1/periode_4/vak{1..$AANTAL}


fi