Different from the others

I made a story out of this. :)

One fine day, a turtle named Josef went to a certain place. He read the note "Had fun, love Mario" and saw the shelves of the turtles with different colors. Suddenly, many questions were already formed in his mind. "What happened to them?". "Is it really true that once Mario jumped twice on the turtle, it would change its shelf's color and they would die?". Good thing that he was not there when the tragedy happened and thank goodness his friend was saved. :)