There were lights in the old thimbleberry lines but if all you have are darks I would supplement with light neutrals and make offset log cabins (also known as curved Log Cabin). When I made mine I used 1 1/2" and 1" wide strips but you can easily do them with other sizes.
Dunster's Log cabin star pattern uses two different width strips. You can sort the strips into like sizes and use all the same width strips in loads of different block designs that use strips like Courthouse Steps, Pineapple, Spiderweb and regular Log Cabin.
You can make "strata" fabric out of many strips sewn together then recut into other shapes. 2" strips can be cut down into 2" squares matched with a light and make HST. If you sew one diagonal seam you will get one 2" UF size HST but if you sew a 1/4 on either side of the center diagonal line you will get two 1 1/2" UF size HST.
If you have a lot of 2" x WOF strips you can try making a bargello.