Make Next and Previous Navigation in Image Large Thumbnail

Hi, there I want to create a next and previous arrow in image, how can I do it in code.

the scenario is this;
Left Arrow LARGE IMAGE RIGHT Arrow

They are all in content, I will be making art gallery in https://peacockdrawing.com/lion-painting-acrylic-visual-art/

for my visitors will easily navigate all my artworks one by one ..

Thank you.

The page I need help with: [log in to see the link]