Sticky prodcut image craft theme

[ellisbosisio]

Hi I'm try to generate a stiky effect on product page.

Goal is to show always on left side of monitor (where big screen - no mobile) product images when you are in product page.

Here an example. 

https://vaigustando.it/products/specialita-semintegrale-bio-farro-monococco-penne-500g

site runs under password: vaigustando123

THEME: craft v 11 (natively the theme doesn't allow this behavoiur)

here an example page:

https://vaigustando.it/products/specialita-semintegrale-bio-farro-monococco-penne-500g

is anybody able to help me without using 3rd party app?

best