User blog comment:Edwin Shade/My Googological Goals For The Year Of 2018/@comment-32697988-20180101223205/@comment-30754445-20180104161127

BTW there's a mistake in one of my examples in the original explanation.

(0,0)(1,0)(2,0)[4] expands to (0,0)(1,0)(1,0)(1,0)(1,0)[4] (part A here is (0,0) and part B is (1,0)).