---

#define PR A0
#define LED1 3
#define LED2 5

void setup()
{
  Serial.begin(9600);
  pinMode(PR, INPUT);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop()
{
  int prValue = analogRead(PR);

  Serial.print("Value = ");
  Serial.println(prValue);

  int newValue = map(prValue, 0, 1023, 0, 255);

  analogWrite(LED1, newValue);
  analogWrite(LED2, 255 - newValue);
}