I think this little square would make a great stash buster of all those scraps. It’s a small square at about 7.5 cm/3” and doesn’t take much yarn. The 4 options I have shown here are by no means all! You can use as many colours as you like, no need to stick to 2.

I have given you 4 versions of the pattern, taking into account colour changes. You’ll see the way you begin and end each round depends on where the colour changes take place.