How do I make the slideshow?

slideshow {
# The list of textures to be displayed on the slideshow. If empty, the slideshow is ignored.
# Default: [
S:Textures <
packmenu:textures/background/fondo1.png
packmenu:textures/background/fondo2.png
packmenu:textures/background/fondo3.png
packmenu:textures/background/fondo4.png
>