Help me

Hi guys,
I've a problem with programming (I don't know how to programme). The project that I'm working on is on this website: plz take a look

http://www.worldofgz.com/electronique/radar-recul-telemetre-arduino/

Problem: I don't know how to separate the Ultrasonic from the rest of the circuit by using RF(transmitter -Receptor) and 2 Arduinos UNO so that the Ultrasonic becomes wireless.

Could you help me, please? :frowning:
I really need help
and thanks in advance

Helping is if you have done something and are stuck.
You have done nothing, so you are expecting someone to do the work.
Not going to work.