This crochet chart is a little bit different from the filet crochet chart. This is similar to the Graphgans. Each square is a stitch. In this pattern, each square is a single crochet stitch. 5 different colors are used in this pattern. Of course, you can change the colors as you please. :)
How to make your own Graphgan pattern
Graphgan patterns can be made using crochet stitch software. I use the filet crochet design software called CrochetDesign. To make Graphgan, you must change the settings to single stitch. If not, it will make filet crochet diagrams.