Oh gosh, this will be a challenge. Such a dark quilt for a baby quilt too. Are the blocks seamed with a crosswise seam resulting in each block having four sections? Wonder what an echo of each individual triangled portion would look like? StitchinJoy's idea of round&round bun sounds good. This quilt needs movement and, like you, I am at a total loss too. Good luck and let us see your finished project.