This is a great way to use your scrap yarn. Cut your scrap yarn to varying lengths. Tie at end with a plain knot leaving a 2” tail. As you crochet don’t weave in your tails.

Row 1 :Ch 79+ to get desired width. Sc in second ch from hook and in each ch across.

Rest of Rows (until get desired length):Ch 1 and sc in each sc across

I assume dc could be substituted for sc in which case you’d ch 3 in lieu of ch 1.