void setup() {
  pinMode(12, OUTPUT);//เขียว ชุดทางเอก
 pinMode(14, OUTPUT);//เหลือง ชุดทางเอก
 pinMode(27, OUTPUT);//แดง ชุดทางเอก
 pinMode(25, OUTPUT);//เขียว
 pinMode(33, OUTPUT);//เหลือง
 pinMode(32, OUTPUT);//แดง
 Serial.begin(9600);
}
void loop() {
  int x=10;//แทนเลือกทางเอก
if(x==1){
  Serial.println("ให้ทางเอกไปก่อน");
digitalWrite(32, HIGH);
digitalWrite(12, HIGH);
delay(5000);
digitalWrite(12, LOW);
digitalWrite(14, HIGH);
delay(3000);
digitalWrite(14, LOW);
digitalWrite(27, HIGH);
digitalWrite(32, LOW);
digitalWrite(25, HIGH);
delay(5000); 
digitalWrite(25, LOW);
digitalWrite(33, HIGH);
delay(3000);
digitalWrite(27, LOW);
digitalWrite(33, LOW);
}else{
Serial.println("ให้ทางโทไปก่อน");
  digitalWrite(27, HIGH);
  digitalWrite(25, HIGH);
  delay(5000);
  digitalWrite(25, LOW); 
  digitalWrite(33, HIGH); 
  delay(5000);
  digitalWrite(33, LOW);
  digitalWrite(32, HIGH);
  digitalWrite(27, LOW);
  digitalWrite(12, HIGH);
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(14,HIGH);
  delay(5000);
  digitalWrite(14, LOW);
  digitalWrite(32, LOW);
}
}