Little Ol' Johhny is just fifteen when he sees such a scene.

Mother is on the couch,
Crying herself a glass of water.
Father is in the bedroom,
Raping his own daughter.
Baby Bro is in the kitchen,
Hanging from a wire.
Grandpa is in the Bathroom,
Setting himself on fire.

Little Ol' Johnny is just fifteen when he begins to scream.

Little Ol' Johnny grabs his little ol' gun and puts it against Mother's head.
Little Ol' Johnny pulls that little ol' trigger and now she's dead.
Little Ol' Johnny grabs his little ol' knife and sets it against his Sister and Father's heart.
Little Ol' Johnny swings that little ol' blade and now they are both tart.

Little Ol' Johnny is just a lad when he kills his Sister, Mom, and Dad.

Little Ol' Johnny grabs some little ol' poison and puts it in a glass.
Little Ol' Johnny feeds little ol' Baby Bro and watches him pass.
Little Ol' Johnny grabs a little ol' gasoline and pours it on Grandpa.
Little Ol' Johnny makes a little ol' explosion, falling ashes is what he saw.

Little Ol' Johnny cries a little ol' bit with a rope around his neck.
Little Ol' Johnny pulls a little ol' string and now he hangs on the front deck.