const int ledR = 12;
const int ledY = 11;
const int ledG = 9;
int timeR = 1500;
int timeY = 800;
int timeG = 2500;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("設備啟動");
  pinMode(ledR, OUTPUT);
  pinMode(ledY, OUTPUT);
  pinMode(ledG, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledR, HIGH);
  digitalWrite(ledY, LOW);
  digitalWrite(ledG, LOW);
  Serial.println("紅燈亮");
  delay(timeR);
  digitalWrite(ledR, LOW);
  digitalWrite(ledY, HIGH);
  digitalWrite(ledG, LOW);
  Serial.println("黃燈亮");
  delay(timeY);
  digitalWrite(ledR, LOW);
  digitalWrite(ledY, LOW);
  digitalWrite(ledG, HIGH);
  Serial.println("綠燈亮");
  delay(timeG);
}