Technically, the quilt in the photo above is too big to be a blankie. Please forgive the discrepancy. It was the only sample of this pattern available to me at the moment.
A slightly more complex pattern for using up leftover strips and scraps at least 3" square. All strips are 3" wide. Loose blocks are 7" square; once sewn together, they are 6" square.
This is an especially attractive way to use up black denim. Add or subtract blocks to adjust the blankie's size to your needs.
ALL SEAMS ARE 1/2 INCH.
Suggestions: A black border would look nice with this pattern.
For a smaller blankie, try using nine "nine-patch" blocks and just four of the "rails" blocks, with a nine-patch block in the center -- something like the cutout photo above, except that the half and quarter blocks around the edge would be solid triangles cut from 7" blocks of blue denim.
To learn how to make the nine-patch and rail blocks and join them in a diagonal set, try Patricia Wilens' Quick and Easy Scrap Quilts.
The Roads-And-Rails quilt above was machine-quilted without the aid of a walking foot. See the difference?? Zowie. Get a walking foot if you can, though the quilt will be perfectly functional either way.