directing the dagger scene

I would set the dagger scene as Macbeth looking around the room for a dagger "a dagger of the mind, a false creation" (2.1.37)I would create this scene so that Macbeth would seem more crazy looking for an item that isn't actually there "mine eyes are made the fools o'th other senses" (2.1.44). I think that that scene2 would make Macbeth look more crazy if he was the be looking around the room for a object that is no where to be scene.