//Creat by น.ส.พัชราภรณ์ ปัสสา เลขที่30 ม.4/1
//โปรแกรมไฟจราจร

int RED_LED = 5;
int YELLOW_LED = 6;
int GREEN_LED = 7;
  
void setup() { 
  pinMode(RED_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
}

void loop() { 
  digitalWrite(RED_LED, HIGH);
  delay(4000);
  digitalWrite(RED_LED, LOW);
  delay(1000);
  digitalWrite(YELLOW_LED, HIGH);
  delay(1000);
  digitalWrite(YELLOW_LED, LOW);
  delay(1000);
  digitalWrite(GREEN_LED, HIGH);
  delay(4000);
  digitalWrite(GREEN_LED, LOW);
delay(1000);
}