They are a type of albino, therefore the pink eyes. Cornsnakes and most other snakes are active in the evenings, early mornings and at night. A very bright light may be disturbing him. Its also very early on in your keeping and you may not see him very much. When mine were small you would think I had a bunch of empty tanks. But as he grows and becomes accustomed to you he will be out more often. Mine are often at the side of the enclosures watching me when I am in the room.