int a=5 ;
int b=18 ;
int c=17 ;
int d=12 ;
int e=14 ;
int f=23 ;
int g=22;
int dp=19 ;
int button=21 ;
int bi=0;
void setup() {
  pinMode(a,OUTPUT);
  pinMode(b,OUTPUT);
  pinMode(c,OUTPUT);
  pinMode(d,OUTPUT);
  pinMode(e,OUTPUT);
  pinMode(f,OUTPUT);
  pinMode(g,OUTPUT); 
  pinMode(dp,OUTPUT);
  pinMode(button,INPUT_PULLUP);
}
int v = 0;
int etat = 1;
void loop() {
int i=digitalRead(button);
if (i==0){
  delay(200);
  Serial.println("55");
  while(digitalRead(button) == 0);
  delay(200);
  v= etat + v;
  if(v>9){
    v = 8;
    etat = -1;
  }else if(v<0){
    v = 1;
    etat = 1;
  }
}
switch(v){
  case 0:
    digitalWrite(a,HIGH);
    digitalWrite(b,HIGH);
    digitalWrite(c,HIGH);
    digitalWrite(d,HIGH);
    digitalWrite(e,HIGH);
    digitalWrite(f,HIGH);
    digitalWrite(g,LOW);
  break;

  case 1:
    digitalWrite(a,LOW);
    digitalWrite(b,HIGH);
    digitalWrite(c,HIGH);
    digitalWrite(d,LOW);
    digitalWrite(e,LOW);
    digitalWrite(f,LOW);
    digitalWrite(g,LOW);
    break;

  case 2:
    digitalWrite(a,HIGH);
    digitalWrite(b,HIGH);
    digitalWrite(c,LOW);
    digitalWrite(d,HIGH);
    digitalWrite(e,HIGH);
    digitalWrite(f,LOW );
    digitalWrite(g,HIGH);
    break;

  case 3:
    digitalWrite(a,HIGH);
    digitalWrite(b,HIGH);
    digitalWrite(c,HIGH);
    digitalWrite(d,HIGH);
    digitalWrite(e,LOW);
    digitalWrite(f,LOW);
    digitalWrite(g,HIGH);
    break;

  case 4:
    digitalWrite(a,LOW);
    digitalWrite(b,HIGH);
    digitalWrite(c,HIGH);
    digitalWrite(d,LOW);
    digitalWrite(e,LOW);
    digitalWrite(f,HIGH);
    digitalWrite(g,HIGH);
    break;

  case 5:
    digitalWrite(a,HIGH);
    digitalWrite(b,LOW);
    digitalWrite(c,HIGH);
    digitalWrite(d,HIGH);
    digitalWrite(e,LOW);
    digitalWrite(f,HIGH);
    digitalWrite(g,HIGH);
    break;

  case 6:
    digitalWrite(a,HIGH);
    digitalWrite(b,LOW);
    digitalWrite(c,HIGH);
    digitalWrite(d,HIGH);
    digitalWrite(e,HIGH);
    digitalWrite(f,HIGH);
    digitalWrite(g,HIGH);
    break;

  case 7:
    digitalWrite(a,HIGH);
    digitalWrite(b,HIGH);
    digitalWrite(c,HIGH);
    digitalWrite(d,LOW);
    digitalWrite(e,LOW);
    digitalWrite(f,LOW);
    digitalWrite(g,LOW);
    break;

  case 8:
    digitalWrite(a,HIGH );
    digitalWrite(b,HIGH );
    digitalWrite(c,HIGH );
    digitalWrite(d,HIGH );
    digitalWrite(e,HIGH );
    digitalWrite(f,HIGH);
    digitalWrite(g,HIGH );
    break;

  case 9:
    digitalWrite(a,HIGH );
    digitalWrite(b,HIGH );
    digitalWrite(c,HIGH );
    digitalWrite(d,LOW );
    digitalWrite(e,LOW );
    digitalWrite(f,HIGH );
    digitalWrite(g,HIGH );
    break;
}
}