Thanks for all the feedback everyone, I really appreciate it!

Eamea, I just got a yarn needle and whipstitched them together. It took a while, but not as long as making the squares!
Tshanafelt, as soon as I find the pattern I'll post it up, promise.
raeraethejetplane, I found my treasure chest at Hobby Lobby. Be careful though, because my treasure chest was JUST big enough for the rug; that bad boy turned out to be a lot bigger than I anticipated!