How to make similar slider in Blocs

I try to recreate my friend website on Blocs, and i dont know how to make similar slider.

1 st row is slider with big pictures with 100% width
2 nd row is slider with mini photo. Clicking on mini photo change slide in big photo row

please help

H @goras
This looks like a simple gallery.
There are plenty of apps out there to produce these for you.
I use Juicebox.

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ty for advice