#define LED_R 26
#define LED_Y 12
#define LED_G 14
#define LDR 18
byte LDR_value = 0;

void setup() {
  Serial.begin(115200);
  pinMode(26, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(18, INPUT);
}

void loop() {
  LDR_value = digitalRead(18);
  Serial.println(LDR_value);
  delay(500);
  if (LDR_value == 1) {
    digitalWrite(26, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(14, HIGH);
  }
  else {
    digitalWrite(26, LOW);
    digitalWrite(12, LOW);
    digitalWrite(14, LOW);
  }
  delay(500);
}