OK here's my Mini Challenge entry
Red and dark navy (looks black) striped tee, cut on the diagonal for an interesting effect.
For the pattern I used a mash up of the long sleeve from Simplicity 8375 and the body and neckline from Simplicity 8376. But any basic tee pattern would work.
I wanted to do something different than the classic horizontal striped tee, so folded the fabric on the diagonal and cut all the pieces out like that. I treated the diagonal fold as the new grain line, cutting the front, back and neckband on that fold and the sleeves parallel to it.
It is quite fun, but perhaps would have been better with the neckband on the cross grain.