This pattern uses just one crochet stitch - Treble Crochet (this is called a Double Crochet in the US). It's an incredibly simple but very effective mixed stripe using two rows of crochet for each colour. The simplicity of it.
If you’re looking for a crochet stitch that works up fast and is easy to master, the v-stitch is perfect! And I love how one row of v-stitches looks like a zig-zag. You could alternate colors every row, make blocks of colors, or stripes. This baby blanket