One thing I remember about my grandmother's house was all of the beautiful crocheted blankets she had draping across the furniture. She was an avid crocheter that took her yarn and hook with her everywhere she went. I designed a simple modern granny square in honor of her, that showcased my lifelong love of black and white.
You may choose to keep the black and white scheme or a gradient of colors.
The photo shown is the throw size (48 inch by 60 inch), but several other blanket sizes and the amount of squares needed are incorporated. Also included is the amount of yarn used for each square and how much is needed for the blanket size of choice.