Simple code which modelises a water fountain on Arduino

waterFountain.ino

const int switchG = 2;
const int switchA = 3;
const int switchB = 4;
const int switchC = 5;
const int vanne   = 6;

int switchGstate = 0;
int switchAstate = 0;
int switchBstate = 0;
int switchCstate = 0;

unsigned long TEMPS_DEBUTA;
unsigned long TEMPS_A;
unsigned long Volume_A;
unsigned long TEMPS_DEBUTB;
unsigned long TEMPS_B;
unsigned long Volume_B;
unsigned long TEMPS_DEBUTC;
unsigned long TEMPS_C;
unsigned long Volume_C;

void setup()
{
  pinMode(switchG, INPUT);
  pinMode(switchA, INPUT);
  pinMode(switchB, INPUT);
  pinMode(switchC, INPUT);
  pinMode(vanne, OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  switchGstate = digitalRead(switchG);
  switchAstate = digitalRead(switchA);
  switchBstate = digitalRead(switchB);
  switchCstate = digitalRead(switchC);
  
  if(switchGstate == HIGH)
  {
    digitalWrite(vanne, HIGH);
  }
  else
  {
    digitalWrite(vanne, LOW);
  }

  if(switchAstate == HIGH)
  {
    if(switchGstate == LOW)
    {
      TEMPS_DEBUTA = millis();
    }
    else
    {
      TEMPS_A = millis() - TEMPS_DEBUTA;
      Volume_A = TEMPS_A / 333;
      Serial.print("Volume Servi A: ");
      Serial.println(Volume_A);
      delay(333);
    }
  }

  if(switchBstate == HIGH)
  {
    if(switchGstate == LOW)
    {
      TEMPS_DEBUTB = millis();
    }
    else
    {
      TEMPS_B = millis() - TEMPS_DEBUTB;
      Volume_B = TEMPS_B / 333;
      Serial.print("Volume Servi B: ");
      Serial.println(Volume_B);
      delay(333);
    }
  }

  if(switchCstate == HIGH)
  {
    if(switchGstate == LOW)
    {
      TEMPS_DEBUTC = millis();
    }
    else
    {
      TEMPS_C = millis() - TEMPS_DEBUTC;
      Volume_C = TEMPS_C / 333;
      Serial.print("Volume Servi C: ");
      Serial.println(Volume_C);
      delay(333);
    }
  }
}