How to create such layout?

Question

css

I was interested in css grid but I don’t have an exact understanding
for the test, I wanted to create such a layout:

it turned out like this: https://codepen.io/topicstarter/pen/LdeOVM
please explain how to do this?
this is not a job but just a question for understanding the implementation
about CSS Grid support I know...

Answer 1

You can do this...
https://codepen.io/aliencash/pen/RMxQoY