This granny stitch planned pooling pattern is written by Rocky of RockinLola and is featured on Marly Bird’s blog. Please follow the link to Marly’s blog to access the pattern.
http://www.marlybird.com/granny-stitch-planned-pooling-cr...

This granny stitch planned pooling pattern will guide you on how to use the granny stitch / granny stripe with the crochet planned pooling technique. It is written in American US crochet terms.

Planned Pooling is all about adjusting your tension to make the colors pool into a specific pattern. While the pattern here suggests a certain hook size and number of clusters, these may vary from person to person.

In order to get similar patterns to the featured photos, use self striping yarns with a regular repeating pattern.
Red Heart Yarns that work well with this method include:
Red Heart Super Saver Neon Stripes
Red Heart Super Saver Primary Stripes