Welcome, that is called a Penwiper rug. Does the sewn pieces resemble a sort of point ? I have never made one myself but you get your squares and lay them on your first row so that they resemble a diamond, fold the right and left points so that they meet in the middle and then sew across. On the next row you place the squares in between the first rows squares and again you fold and sew making sure that you don't sew over anything of your first row. Does that make sense ?