Been months and I still can't figure out how to properly punctuate the following couple of sentences. It's infuriating. Please help me, and if possible (not obligatory) briefly explain why. I'd like to learn for future reference. That way if I run into another conundrum, I'd know what to do.
Thanks in advance!!
Theodore shoved them through a maroon-colored door at the very top and into a round room filled with far stranger sights than those downstairs. In one corner (if round rooms could have corners) were chalk-smeared blackboards filled with insanely complicated mathematics; in another, bottles and jars filled with chemicals. And in the middle of it all, spread out on several tables, were designs and drawings of half-built gadgets that would soon serve some purpose.