@default_foreground ||= "black" @default_background ||= "white" set_foreground(@default_foreground) set_background(@default_background) add_image_path("ruby-images") include_theme("default-icon") include_theme("default-title-text") include_theme("default-text") include_theme("default-title-slide") include_theme("default-slide") include_theme("default-item-mark") include_theme("default-method-list") include_theme("default-preformatted") include_theme("default-block-quote") include_theme("default-foot-text") include_theme("default-description") include_theme("image") include_theme("table") include_theme("newline-in-slides") include_theme("slide-number") include_theme("per-slide-background-color") include_theme("background-image-toolkit") include_theme("per-slide-background-image") include_theme("body-background-image") include_theme("tag")