You can obviously see me now, But only for a little while, Because if you will look again, I will be gone without a smile; I am here, or I can be there, I'm in the shadows or I'm not, You can try to look everywhere, You're always cold, you're never hot; So try to catch me if you can, I'll appear when you least expect, In front or in the back of you, I am Ninja, don't you forget.