Making Sections visible/invisible dynamically

Making Sections visible/invisible dynamically

Dear all, your assistance is very appreciated.

We have 3 sections in a module "Potentials":
Section1
Section2
Section3

There is a picklist in Section1:
Option1
Option2
Option3

We require the following behavior of Zoho CRM:
if Option1 is selected, then Section2 is visible, Section3 is invisible
if Option2 is selected, then Section2 is invisible, Section3 is visible
if Option3 is selected, then both Section2 and Section3 are visible

Do you have any ideas how to resolve this?