"The Witch gave Dorothy a friendly little nod, whirled around on her left heel three times, and straightway disappeared, much to the surprise of little Toto, who barked after her loudly enough when she had gone, because he had been afraid even to growl while she stood by.

But Dorothy, knowing her to be a witch, had expected her to disappear in just that way, and was not surprised in the least."

By the way, in the book, the shoes are silver, not red.