The curious thing is that during the latter part of the meditation, it felt like the letters were being woven together. In Sefer Yetsirah is states in Rabbi Aryeh Kaplan's version in Chapter 1 Verse 11:
"...He engraved them like a sort of gardenI have learned from one of my teachers that the garden is like a flower bed. The ceiling can be like a thatched roof - woven together. Another meditation I do feels very much like arranging the letters in a flower bed. I wonder what meditative technique builds the walls...?
He carved them like a sort of wall
He covered them like a sort of ceiling..."