simple motion sensor

Projects General Guidance
16 
const int sensorPin1 = 14;         //changed 
const int sensorPin2 = 15;                 //changed
const int sensorPin3 = 16;                //changed

const int ledPin1 = 11;        
const int ledPin2 = 2;
const int ledPin3 = 3;
const int ledPinMain = 4;

int sensorValue = 0;         // the sensor value
int sensorMin = 1023;        // minimum sensor value   
int sensorMax = 0;  

void setup() {
  // turn on LED to signal the start of the calibration period:
  pinMode(11, OUTPUT);
  digitalWrite(11, HIGH);

  pinMode(2, OUTPUT);
  digitalWrite(2, HIGH);

  pinMode(3, OUTPUT);
  digitalWrite(3, HIGH);

  // calibrate during the first five seconds  // this part i did not understand
  while (millis() < 5000) {
    sensorValue = analogRead(sensorPin1);
    sensorValue = analogRead(sensorPin2);
    sensorValue = analogRead(sensorPin3);



    // record the maximum sensor value
    if (sensorValue > sensorMax) {
      sensorMax = sensorValue;
    }

    // record the minimum sensor value
    if (sensorValue < sensorMin) {
      sensorMin = sensorValue;
    }
  }

  // signal the end of the calibration period
  digitalWrite(11, LOW);
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
}

void loop () {


}

this code works in compiler (now i know what it is :blush:)
can you give me a tip, how do I loop that? please