Another blanket in the making

The long cold Winter has inspired me to make more blankets. So I started working on another crochet one. This time I am using the 'Gretchen' afghan square pattern and the yarn is Heartland from Lion Brand. I love the yarn and the way the first square turned out. Now I am asking myself if I should make all squares in the same color combination or if I should mix things up a bit. I am using four colors instead of five as in the original pattern.