If you intend to communicate two equally important and closely related ideas, you certainly will want to place them close together, probably in a compound sentence.

Good Grammar:

Compound Sentences

Coordinating conjunction: FANBOYS (for, and, nor, but, or, yet, so)

Pam entered the cave first, and her friend followed her.

Semicolon: no need for FANBOYS

Pam entered the cave first; her friend followed her.

Conjunctive adverbs: HOTSHOT CAT (however, otherwise, therefore, similarly, hence, on the other hand, then, consequently, also, thus) *no comma after then, now, thus and soon

Pam entered the cave first; however, her friend followed behind.