She lights a second match, and can see through the wall of the house she's next to. On the table are all kinds of delicious foods.
She lights a third match, and envisions that she's sitting under a Christmas tree. Right then, she sees a shooting star, which her grandmother (who's dead) told her means that someone is dying.
She strikes another match, and sees a vision of her grandmother. She keeps lighting matches in order to keep grandma close, and then her grandmother takes her and flies up to heaven.
The girl's body is found the next morning. But if you've gotta die, dreaming of delicious goodies before joining your grandmother up in heaven isn't such a bad way to go.