Display layer if 2 of 3 field options are selected

Apologies in advance...newbie here...

I am creating a form where I would like for the following to occur:

• The field is "Position Type" and has three options: Permanent, Temporary, Variable

(I have not yet decided if I want radio buttons or a dropdown; only one selection can be made)

• If Temporary or Variable are selected, I would like to display text next to the field.
• If Permanent is selection, nothing should happen.

I created the layer that has the jpg of the text I want displayed and positioned it.

I've searched around the forums, web and youtube for some script that I could adapt but haven't found anything.

If you someone could guide me to a resource that could assist, I would be deeply grateful!