Need help making multiple lists that are dependent on the first list.

I need help making a few drop down lists that are all dependant on the selection from the first drop down list. Basically, I want the first list to have a few options and if you pick one option 3 more lists will appear that are all based on the first selection.

Example:

Main List:
Drywall
Studs
Plywood
Joint Treatment

If someone chooses drywall 3 new lists will populate:
List 1:
1/4"
1/2"
5/8"
Enter value

List 2:
4x8
4x10
4x12
Enter value

List3:
Type X
Type C
Non Rated
Enter Value

If someone chooses studs 3 different lists will need to appear. How can I do this?