You'd have to be super lucky. If you hit, both snakes would then turn out to be 100% for that trait (albino or pied, depending on which one you were trying). If you didn't hit, the snakes could still be 100% het for that trait, but you still might not hit albino or pied on the first clutch. Also, if you didn't hit, it could turn out that one or both of the snakes were just normals, and not acutally het's at all.