baba

int led1=9;
int led2=10;
int led3=11;
int lum=0;
void setup()
{
  pinMode(led1,OUTPUT);
   pinMode(led2,OUTPUT);
   pinMode(led3,OUTPUT);
  Serial.begin(9600);
}
void loop()
{
int valeur=analogRead(lum);
  Serial.println(valeur);
  if (valeur==0)
  {
    digitalWrite(led1,LOW);
     digitalWrite(led2,LOW);
     digitalWrite(led3,LOW);
  }
  else if (valeur<5)
  {
     digitalWrite(led1,HIGH);
     digitalWrite(led2,LOW);
     digitalWrite(led3,LOW);
  }
  else if (valeur<9)
  {
     digitalWrite(led1,HIGH);
     digitalWrite(led2,LOW);
     digitalWrite(led3,LOW);
  }
  else if(valeur<13)
  {
     digitalWrite(led1,HIGH);
     digitalWrite(led2,HIGH);
     digitalWrite(led3,HIGH);
  }
  delay(50);
}