Tumblr blog, how to make posts move outside the window when moving sideways?

Question

Blogs

The theme itself: https://cocorini.tumblr.com/02monochrome

To make the content follow the window. Help me please.
Records I am going to center.



Like here: https://cocorini.tumblr.com/11macaron
Or for example here: https://www.tumblr.com/theme/38617

This thing also blinks on hover.


Blog with text and photos. I would like the photos, instead of one line, to be arranged in groups, like VK.
But this is not difficult to do.