Star Granny Square Crochet

Crafty Amino are having a Starry Night Challenge and i made a star granny square for the challenge.

At first I was thinking about making a small bag with this square.

But then i am too lazy to crochet another one.

It's quite tricky since needed to count every stitch to make sure the shape is right.

But i don't know. I don't think submit a square is suit for the challenge. Looks like an unfinished project.

Maybe i can just make another simple blue square without a star as the back of the bag.