This solid granny square uses 4 colours simultaneously to create a mindboggling spiral.

Stitch markers and counting your friend with this pattern, but it’s worth it for the end result.

This square released as part of the Hodgepodge Blanket CAL and you can find the full list of free granny square patterns here:
https://www.cosyrosieuk.co.uk/free-granny-square-blanket-...