Product variations

Hi,

I want to brush up my product sites with an image selector.

I have this example, it’s danish site, but I’m sure you get were I’m going with this one…

https://www.hifiklubben.dk/hojttalere/gulvhojttalere/bowers--wilkins-cm8-s2-gulvhojttaler/

There’s a dropdown box to the, where you can select the variation of the product and then the image changes to that on the right side ….I want that ?? But how do I do this??