One of my favorite motifs from the vintage pattern books is the U3, O3/O3, U3 star. Star in a Cross is found on p 15 of Weave-It Magic Squares, and the little star motif is in several of the patterns in that book.
The star seems to show up best when L3 and L4 are the same color. If you’re using two colors, low contrast tends to complement the motif (but not always).
Naturally, I couldn’t leave it alone, so I added some extra 3/4 stars for Star in a Cross variation.