List numbering style

Hello everyone,

I want to create a custom list style.

Is it possible for level 1 headings to be in the form of I, II, III,

and for level 2 headings to take level 1 but with normal numbers: 1.1, 1.2, 1.3, etc.

The goal is to have a structure like this

I Title 1

  1.1 Title 2

  1.2 Title 2

II Title 1

  2.1 Title 2

  2.2 Title 2

Thank you for your help

Xuorel