I made one of these GRANNY SQUARE BAGS a while back - you only need 13 squares and the bag works up in no time at all.
I didn't use a pattern - just made it up as I went, adding in a light grey and dark grey for contrast:
I am so totally in love with these delightfully puffy flower centres that I have used them on a whole lot of colourful projects - I cannot wait to show you what I have made!
(PS: The pattern for the Thirteen Squares Granny Bag can be found HERE)
(PPS: Variations of the Squares used: POPCORN FLOWERS AND LEAVES and SOLID GRANNY SQUARE)