Football Field Cake

How can you make a round cake resemble a football field?  I was asked to make a football cake by my friend Heather and came up with this design:

I cut white fondant into even strips and my Ateco number cutters for the yard lines around the sides, and green grass around the borders.

I really loved the way this cake turned out!  The best part was when the birthday boy came to pick it up with his dad.  The huge smile on his face and the at least ten Thank You's I got from him made me so happy that he loved his cake.