int state = 0; // pour commencer avec tout éteind
int start = 49; //bouton pour allumer leds
int progr = 50; //Allumage progressif de toutes les leds
int clign = 51; //clignotement de toutes leds
int rond = 52; //fait tourner les leds en rond via clignotement
int Stop = 53; //arret des leds
int sta, pro, cli, ron, sto = 0;
int leds[] = {2,3,4,5,6,7,8,9,10,11}; //Sur des broches PWM
int brightness = 0;

void setup() {
  
  for(int i=0; i<10; i++) {
    pinMode(leds[i], OUTPUT);
    }
    
    pinMode(start,INPUT); //start
    pinMode(progr,INPUT); //progressif
    pinMode(clign,INPUT); //clignotement
    pinMode(rond,INPUT); //clignoter
    pinMode(Stop,INPUT); //stop
  }

void loop() {
  
  state = state;
  sta = digitalRead(start);
  pro = digitalRead(progr);
  cli = digitalRead(clign);
  ron = digitalRead(rond);
  sto = digitalRead(Stop);

  if(sta==HIGH){
   state = 1;
  }
  else if(pro==HIGH){
    state = 2;
  }
  else if(cli==HIGH){
    state = 3;
  }
  else if(ron==HIGH){
    state = 4;
  }
  else if(sto==HIGH){
    state = 0;
  }

  switch(state){
    case 0: //tout éteind
      for(int i=0; i<10; i++) {
      digitalWrite(leds[i], LOW);
      }
    break;
    
    case 1: //tout allumé
      for(int i=0; i<10; i++) {
      digitalWrite(leds[i], HIGH);
      }
    break;
  
    case 2: //allumage progressif de toutes les leds
      brightness = 0;
      while (brightness <= 255){
        for(int i=0; i<10; i++) {
           analogWrite(leds[i], brightness);
           delay(50);
           brightness = brightness +5;
           if (state==1 || state ==2 || state==3 || state==0){
            break;
           }
           }
         }
      while (brightness >= 0){
        for(int i=0; i<10; i++) {
           analogWrite(leds[i], brightness);
           delay(50);
           brightness = brightness -5;
           if (state==1 || state ==2 || state==3 || state==0)break;
           }
         }
 
    break;
    
    case 3: //clignotement de toutes les leds
      for(int i=0; i<10; i++) {
         digitalWrite(leds[i], HIGH);
      }
      delay(60);
      for(int i=0; i<10; i++) {
         digitalWrite(leds[i], LOW);
      }
       delay(60);
    break;
      
    case 4: //allumage des leds en tournant
       if (digitalRead(leds[2]) || digitalRead(leds[4])  || digitalRead(leds[6])  || digitalRead(leds[8])  || digitalRead(leds[0])  == HIGH){
        for(int i=0; i<10; i++) {
          digitalWrite(leds[i], LOW);
         }
         }
        
      for(int i=0; i<10; i++) {
        digitalWrite(leds[i], HIGH);
        delay(30);
        digitalWrite(leds[i], LOW);
        if (state==1 || state ==2 || state==3 || state==0)break;
      } 
     break;
     
  }// fin Switch
} //fin void loop