const byte BUTTON_PIN = 2;
const byte EYE_PIN = 3;
void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(EYE_PIN, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  bool pressed = digitalRead(BUTTON_PIN) == LOW;
  digitalWrite(EYE_PIN, pressed ? HIGH : LOW);
  Serial.print("button:"); Serial.print(pressed ? 1 : 0);
  Serial.print(",eye:"); Serial.println(pressed ? 1 : 0);
  delay(20);
}