// Déclarations des sorties PWM
int ledA = 9;
int ledB = 5;
int ledC = 6;

void setup() {

     pinMode(ledA, OUTPUT);
          pinMode(ledB, OUTPUT);
               pinMode(ledC, OUTPUT);
}

void loop() {
         analogWrite(ledA, random(20,80));
                  analogWrite(ledB, random(20,80));
                           analogWrite(ledC, random(20,80));
      delay(random(30,100));
}