This block is based on a popular patchwork motif. Repeated in large numbers it has a tendency to become a geometric visual texture. In monochrome it is evocative of a cityscape; in bright colors a familiar piece of folk art. It could find a place in most styles of afghan.
Foundation chain: Using yarn A, ch 29.
Row 1: insert the hook into the 3rd ch from the hook, work 1sc this completes the first 2 sts. 1sc into each ch to the end of the row-28 sts.
Cont to work using sc and the chart as reference. Ch 2 (counts as 1 sc) at the beginning of each row, and work the last sc into the bottom of beg-ch before turning. Read the chart from right to left on odd numbered rows and left to right on even numbered rows.
Fasten off yarn.
Work squares with a circle in yarn A and squares without a circle in yarn B.
Pattern by permission from Crochet Blocks in a Box by Luise Roberts, St. Martin's Griffin, 2007