Spikes that protrude/retract on a timer

>Trigger spikes but they activate on time instead of movement (Ex: standing on them will kill you if you don't jump right away) also they deactivate after a couple of seconds

A similar idea to Trigger Spikes, except on a timed cycle.

Personal notes: I like the idea of being able to define "active" and "inactive" durations, as well as a time offset, so that they can be used to create a sequence of safe and unsafe spots. Additionally helpful would be a short period of time when they look like trigger spikes to warn the player that they're about to pop out.

_Requested by Rue#6664_