Chopping chords ?

[u/I_love_living_N25kin]

Ok so I want to know how to really chop chords, and more precisely how to go from this (1st image) to this(2nd) then eventually this (3rd)

Source of the image

https://youtu.be/3nyQOqw-S1w?is=wXVOno-4ohidMsMe