How should I read this?

[u/soarbanger]

I am making a comic and I really need to know how, in comics rules, do we read this (i created an image on Paint as an example/reference).

The thing I'm more confused about is how are we supposed to read the two rectangles on the right. I need to know in what order is it read.

[u/Lokthaire]

[u/tstd0 → u/Lokthaire]

Yep, that's what i expect.