Find an interesting t-shirt and a contrasting/matching coloured t-shirt.
(For instance a white t-shirt with logo and a contrasting orange t-shirt)
Cut 4 squares from white t-shirt. Pin the 4 squares onto contrasting t-shirt and cut out.
I cut 4 squares but you could do as many as you want.
Pair up the white and orange squares.
'good sides' facing outwards.
I turned the edges in roughly an inch and pinned. This is so the edges are neat.
You could always not turn edges in and just zig-zag stitch around edges to finish off.