My suggestions are to either use a serpentine stitch going diagonally across the quilt, both directions. Or if you want to be adventurous try a large meander/stipple stitch all over the quilts. Or loops all over.
Variegated threads are my favorite for quilting.
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!