What are your tips on how to implement such layout?

Question

css

I made up through positioning and the after pseudo-element, that is, I made up the blocks, aligned them and then aligned the circles with respect to these blocks, I won’t drive you into a lot of discomfort in the little things. Does anyone have any ideas how to make these circles so that they are in the center and relate specifically to these blocks, because there is a hover effect for the blocks, when you hover over the block with the mouse, the circle should increase ...

Answer 1

https://www.youtube.com/watch?v=jblAsT79xvM Excellent layout of this timeline)