const int  buttonPin = 2;    
const int M80 = 3;
const int Relay = 12;      

int buttonPushCounter = 0;  
int buttonState = 0;        
int M80State = 0;         
int lastButtonState = 0;     

void setup() {
  pinMode(buttonPin, INPUT);
  digitalWrite(buttonPin, HIGH);
  pinMode(M80, INPUT);
  digitalWrite(M80, HIGH);
  pinMode(Relay, OUTPUT);
  Serial.begin(9600);
}


void loop() {
  buttonState = digitalRead(buttonPin);
  M80State = digitalRead(M80);
  
  if ((buttonState != lastButtonState)||(M80State != lastButtonState)) {
    if ((buttonState == LOW)||(M80State == LOW)) {
      delay(100);
      buttonPushCounter++;
  }
  }
  lastButtonState = (buttonState+M80State);
  if (buttonPushCounter % 2 == 0) {
    digitalWrite(Relay, LOW);
    delay(1000);
  } else {
    digitalWrite(Relay, HIGH);
    delay(1000);
  }
}