Pitt Coasters - a College Gift

About a month ago, I crocheted some coasters for my son and his friends at the University of Pittsburgh.  Pitt's colors are dark blue and gold.  I had to improvise on some of the coasters with a bit of yellow but I prefer the color scheme of the gold.  The coasters were a request from his friends.  They are reportedly well-used on the coffee table in the dorm room.  Although no step by step pattern is shown here, any basic circle or square shape could be used with a bit of cotton yarn in collegiate colors to create the same sort of gift.  Enjoy the inspiration!  Sher