This is a pattern to make simple Granny Triangles which can be strung together to make a length of cheery bunting. Here I'm using my left over bits of Stylecraft Special DK acrylic) on a hook and each.
Crochet - Granny Spike Stitch - leaves fewer gaps, because the second double crochet is crochet through the top of the second double crochet of the row below. Possibly use a dc,tc, dc pattern in the clusters? From Do It Darling.