I saw a Pinterest post with this scarf done by Summer Cromartie. You can view the pin here:
https://pin.it/fF1oVUD

Summer used a baby blanket pattern and simply made it with fewer repeats. I posted my version of this scarf and many people were asking for a pattern. I’ve written out what I did here, but the original idea was not mine.

The baby blanket Summer was inspired by can be seen here:
http://lacycrochet.blogspot.ca/2014/02/diamond-stitch-bab...