#include 
Servo monServomoteur;


int mq3_analogPin = A2; // connected to the output pin of MQ3

int value;

void setup(){
Serial.begin(9600); // open serial at 9600 bps
monServomoteur.attach(9);
monServomoteur.write(100);
pinMode(8,OUTPUT);//blue led for saying you are too drunk try again later
pinMode(6,OUTPUT);//green led for saying you are negative you can drive
pinMode(4,OUTPUT);//yellow led for saying please wait
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,HIGH);
delay(5000);
digitalWrite(4,LOW);
}

void loop()
{
 value = analogRead(mq3_analogPin);

 Serial.print("alcool value:");
 Serial.println(value);
 delay(1000); //Just here to slow down the output
 
 if ((value > 70) and (value < 110))
 {                                         // range des valeurs pour ouvrire la boite
 
  monServomoteur.write(10);
  digitalWrite(6,HIGH);
  delay(15000);
  digitalWrite(6,LOW);
 }
 if  (value > 120);
 {
  monServomoteur.write(100);
  digitalWrite(8,HIGH);
  delay(1000);  
  digitalWrite(8,LOW);
 }
}