Node Red using Timer Helper

I am new in NR, but I want to create a flow, which makes following:

PIR detected → switch on the Light Switch → Start Timer Helper → Wait until the Timer ends → Switch off the Light Switch → Reset Timer

How is it possible to add Timer Helper to the NR and how can I reset it too?

Thank you in advance,

Use a merge node as timer.
A merge node will not send a msg out until its timeout is reached and each new msg received will reset the timer.
It will be something like this then.
PIR detect → Turn light on → Merge node → Turn light off

Thanks for the tips guys, I used this at the end: