Dynamic form - Ruby event trigger

Hi,

I am trying to create a form to manage users permissions in my tool (Check picture in attachment).

When the user selects “Revoked” Membership, I want all the tools below to be disabled and to take the “None” value. When the user selects “Administrator” Membership, I want all the tools below to be disabled and to take the “Administrator” value.

How can I achieve that (with ruby script) in Cloudforms?

Thank you for your help!