void setup() {
  // put your setup code here, to run once:
  pinMode(8, OUTPUT);//hijau
  pinMode(7, OUTPUT);//merah
  pinMode(2, OUTPUT);
  digitalWrite(7, HIGH);
  delay(200);
  digitalWrite(8, LOW);
  digitalWrite(2,LOW);
  }

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(7)==HIGH);digitalWrite(8, LOW);{ //merah
delay(300);
digitalWrite(2, LOW); //buzer
delay(300);


  digitalWrite(7, LOW);
  digitalWrite(8, HIGH); //hijau
  digitalWrite(2, HIGH);
  tone(2,500);
  delay(200);
  tone(2,600);
  delay(300);
  tone(2,700);
  delay(200);}
}