and operation of ultrasonic sr-04 and PIR sensors

please somebody guide me about the programming of 2 subject sensors and operation

  1. Find code libraries and examples which match (a) your processor e.g. Arduino Uno and (b) your sensors.
  2. Write separate programs, each dealing with one sensor, to see how these work.
  3. Combine the programs.

please somebody guide me about the programming of 2 subject sensors and operation

To do what?