How do I make a Donut platform from mario?

godot-4

Question

I want to make a respawning falling platform on a timer, The player walks onto the platform, and a timer starts, if the player exits the platform the timer resets. If the player waits the full time it falls, and after it exits the screen it waits 3 to 5 seconds then reappears.

Use an Area2D to detect when the player enters or exits it. Use a Timer to count down the time to fall and to re-spawn. Use a VisibleOnScreenNotifier2D to know when it exits the screen, start the re-spawn timer, and re-spawn it.