A countdown timer. Counts down a specified interval and emits a signal on reaching 0. Can be set to repeat or "one-shot" mode. [b]Note:[/b] To create a one-shot timer without instantiating a node, use [method SceneTree.create_timer]. https://godotengine.org/asset-library/asset/515 Returns [code]true[/code] if the timer is stopped. Starts the timer. Sets [code]wait_time[/code] to [code]time_sec[/code] if [code]time_sec > 0[/code]. This also resets the remaining time to [code]wait_time[/code]. [b]Note:[/b] This method will not resume a paused timer. See [member paused]. Stops the timer. If [code]true[/code], the timer will automatically start when entering the scene tree. [b]Note:[/b] This property is automatically set to [code]false[/code] after the timer enters the scene tree and starts. If [code]true[/code], the timer will stop when reaching 0. If [code]false[/code], it will restart. If [code]true[/code], the timer is paused and will not process until it is unpaused again, even if [method start] is called. Processing callback. See [enum TimerProcessCallback]. The timer's remaining time in seconds. Returns 0 if the timer is inactive. [b]Note:[/b] You cannot set this value. To change the timer's remaining time, use [method start]. Wait time in seconds. Emitted when the timer reaches 0. Update the timer during the physics step at each frame (fixed framerate processing). Update the timer during the idle time at each frame.