int led = 7;
void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
Serial.begin(9600);
     int i = 0;
     while(i < 10) {
     digitalWrite(led , HIGH);
     delay(500);
    digitalWrite(led, LOW);
    delay(500);
    i++;
    }

 Serial.println("i sup à 10"); 
 }
void loop() {
  // put your main code here, to run repeatedly:

}