I wouldn't excactly call it WILD, but VILD. Visually Induced Lucid Dream.

That means to instead of going through a long process of relaxation, you just lay down, relax for a minute or two (like you did) and then you imagine stuff, like you did.

VILD is actually supposed to be done when you go to sleep, but so far, people have most success with it after a few hours of sleep. Congratulations man, it's a pretty tough technique that, as far as I know, is harder than WILD.