Jon had always wanted to be in control, but not to have to do anything, he thought and thought about ways to do that, so he decided, to just wish it. "I wish I was always in control and pleased, but I din't have to make any decisions."
He didn't know what the effects of the wish would be, so he waited, and nothing happened. Many minutes pasted, but nothing happened. He didn't know that he was being watched. A new being had come from the stone. It knew it had a purpose, and it knew that it was going to follow it. It's only purpose was to please it's creator Jon.