This is not really going to be a how to post. I recovered my computer chair with fabric left over from my shower curtain and a small pillow I put on my pink chair. Really you just take the chair apart, put the fabric on how you want and staple it underneath like you would if you recovered a dining room chair. The top was a booger though. You can't take it apart, the original fabric was stapled in and my stapler wouldn't reach down. So I improvised.
Here is the finished product.