#define PIN 7
#define PIN_MODE INPUT_PULLUP


int s = LOW;
int b; //Button state
int counter = 0;
void setup() {
  pinMode(PIN, INPUT_PULLUP);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, s);
  b = digitalRead(PIN);

  
  
  Serial.begin(9600);
}
void loop() {

  int v = digitalRead(PIN);

  if (v == LOW && b == HIGH)
  {
    counter++;
    
    Serial.println(counter);
    if (s == HIGH) {
      s = LOW;
    }
    else {
      s = HIGH;
    }

    digitalWrite(LED_BUILTIN, s);
  }
  b = v;
  
}