int btn = 8;
int a = 0;
void setup() {
  // put your setup code here, to run once:
pinMode(btn , INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead((btn) == HIGH))
  a = a+1;
  Serial.println(a);
  delay(1000);
}