To crochet a classic granny square, start by making a magic ring or slip knot to form a ring. Then, work clusters of double crochet stitches separated by chain stitches into the ring to form the first round. For example, chain 3 (counts as first double crochet), then make 2 more double crochets in the ring, chain 3, and repeat 3 more clusters of 3 double crochets separated by chain 3 in the ring, joining with a slip stitch. In subsequent rounds, turn your work, start in any corner chain space by making 3 double crochets, chain 3, 3 more double crochets to form the corner cluster, then chain 1 and make 3 double crochets in the spaces along the sides, chain 1 between side clusters, and in each corner chain space, make 3 double crochets, chain 3, 3 double crochets. Repeat this pattern around, joining with a slip stitch at the end of each round. This creates a square piece that can be made in single or multiple colors by changing yarn colors at the corners. The pattern is simple and easily memorized, making it perfect for beginners. The key stitches used are double crochet clusters (3 double crochets worked into the same space) and chain stitches to create gaps and corners. Chain 3 at the corners helps keep the square shape sharp. You can keep adding rounds to make the square bigger as needed. Would you like a step-by-step written pattern or a video tutorial recommendation? This summary is based on an easy-to-follow beginner tutorial with detailed instructions and tips for crisp edges and color changes.