doido

  int x,y;

void setup() {
  // put your setup code here, to run once:
  pinMode(2, INPUT);
  pinMode(2, INPUT);
  Serial.begin(9600);
   //attachInterrupt(digitalPinToInterrupt(2), blink, CHANGE);
   //attachInterrupt(digitalPinToInterrupt(3), blink, CHANGE);
}

void loop() {
  // put your main code here, to run repeatedly:
  int ax = x;
  int ay = y;
  x = digitalRead(2);
  y = digitalRead(3);

  if(x != ax){
  Serial.print(x);
  Serial.println(y);
}
  if(y != ay){
  Serial.print(x);
  Serial.println(y);
}
}