#define LED 10
#define LED2 11
#define BP1 9

unsigned long previousMillis = 0 ;
const long interval = 1000;

void setup() {
  // put your setup code here, to run once:
pinMode(LED, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(BP1, INPUT_PULLUP);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {

  previousMillis = currentMillis;
  
  int ledState = digitalRead(LED);
  digitalWrite(LED, !ledState);
  
}

  boolean etatBP1 = digitalRead(BP1);
  digitalWrite(LED2, !etatBP1);
}