Linking two Drop down lists in Adobe Designer using formcalc?

I have two drop down lists on my form:

DropDown1Parent:
Value 0 - Fruit
Value 1 - Vegetable
Value 2 - Everything

Dropdown2Child:
Value 0 - Apple
Value 1 - Orange
Value 2 - Peach
Value 3 - Carrot
Value 4 - Squash
Value 5 - Beet

I am somehow trying to make it so for example:

If DropDown1Parent = 0 then Dropdown2child options are 0,1,2
else
If DropDown1Parent = 1 then Dropdown2child options are 3,4,5
else
If DropDown1Parent = 2 then Dropdown2child options are 0,1,2,3,4,5

Any help would be greatly appreciated. I am using Adobe Designer 7.0