Scene is a group of one or more resource commands that are executed at the same time when the Scene is triggered by a user. For e.g. you want to switch off all the lights in a room (this is a grouping of the ‘Off’ action for every light bulb resource in the room), or perform the setup for a party (which may include many different resource actions such as turn-on disco lights, dim the main lights, turn-on the stereo system, play my playlist and so on). A scene is typically provided as a single button on a user interface which performs all of the predefined actions on being triggered.