Question about hexagram ritual (M2L4)

Hello everyone

I am approaching the first part of the ritual of Module 2 Lesson 4.

I read that a 30 minutes stillness is required in the final part. And it looks like that for the first 5 minutes we have to do the white\black breathing technique, the same as in M1L1.

Then you have to visualize the symbol we have traced for each direction.

I apologize if it may sound silly to ask, but what I am not really sure, is this thing:

Do we have to repeat the entirety of the 30 minutes stillness meditation for each direction (that means the ritual would take more than 2 hours of time) or that every part you have to visualize is expected to be performed within the 30 minutes stillness meditation (repeating the breathing part for each one)?

Thanks in advance!