int redstop = 4;
int yellowait =5;
int greengo =6;





void setup() {
  // put your setup code here, to run once:
pinMode (redstop, OUTPUT);
pinMode (yellowait, OUTPUT);
pinMode (greengo,OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite (redstop,HIGH);
Serial.println("STOP");
delay (200);
digitalWrite(redstop, LOW);

digitalWrite (yellowait,HIGH);
Serial.println("GET READY");
delay (300);
digitalWrite(yellowait, LOW);

digitalWrite(greengo, HIGH);
Serial.println("GO");
delay (200);
digitalWrite (greengo,LOW);

digitalWrite (yellowait, HIGH);
Serial.println("GET READY");
delay (300);
digitalWrite (yellowait,LOW);
}