How do i make a notification when your energy is low?

Wire the Repeater to a Wire Repeater.
Now, wire that Wire Repeater to another Wire Repeater.

(Repeater) Repeater Runs Task —> (Wire Repeater) Repeat Wire Pulse

(Wire Repeater 1) Wire Pulse Repeated —> (Repeater) Stop Repeater


(Wire Repeater 1) Wire Pulse Repeated —> (Wire Repeater 2) Repeat Wire Pulse

(Wire Repeater 1) Wire Pulse Repeated —> (Repeater) Start Repeater