I first began to crochet this afghan for someone who loved orange. By the time I finished it he was 6 and already had two crocheted afghans. So I decided to add the black picot border.
To begin ch136 turn (dc in third ch from the hook and all the way across, ch 2 turn) repeat until you reached the desired size (I just used four skeins of orange red heart yarn)
Note: you don't have to ch exactly 136 that was just my desired length.