01.
Fold (mountain fold) the paper in half.
02.
Unfold the paper so that you can see the crease that you have just made.
*we have used a black pen to distinctively show the "crease".
Base words are uttered only by the base And can for such at once be understood, But noble platitudes:--ah, there's a case Where the most careful scrutiny is needed To tell a voice that's genuinely good From one that's base but merely has succeeded.