Granny Square Blanket pattern by Sarah Hearn, and crochet each colour until it runs out, whether that's at the end of a round or not.
My crochet skills are really basic but I love how easy this project has been. It's been interesting watching how the colours seem to change in tone as new colours are added to the blanket. When I added the turquoise it seemed so jarring against the reds and yellows, but now it seems absolutely fine.
I've just finished adding the multi-toned blue wool and have decided to continue the blanket by adding to two ends so that it becomes more rectangular than square, as this is a far more useful shape. I have a multitude of blankets that are in stupid sizes already. Next comes a darker blue, then I have a wee bit of purple but I'm planning to buy some purple and then a neutral black or grey to finish off both ends.
It often seems the way that a 'stash busting' project results in having to buy more supplies, but at least I have made a useful project from a whole lot of odds and ends.