How to Crochet 2 Color Granny Squares

I found a fabulous crochet granny afghan on Yarnspirations. The free pattern is called Half’n Half Granny Afghan. I looked carefully and realized the squares are actually half colours. This makes the afghan have diagonal stripe opportunities. So I crocheted a sample square to see if I could follow the instructions. I have done a two tone granny in the past but this one is slightly different. I think this has been connectivity when the colours change over. Get the free pattern at http://bit.ly/2jDhBwc