Arduino to Traffic Light

gistfile1.txt

int incomingByte = 0;
int prev = 0;
int RED = 13;
int ORANGE = 12;
int GREEN = 11;

void setup() {                
  pinMode(RED, OUTPUT); 
  pinMode(ORANGE, OUTPUT); 
  pinMode(GREEN, OUTPUT); 
  
  Serial.begin(9600);
  Serial.println("Connected");
}

void reset(){
  digitalWrite(RED, LOW);
  digitalWrite(ORANGE, LOW);
  digitalWrite(GREEN, LOW);
}  

void loop() {
  if (Serial.available() > 0) {
    incomingByte = Serial.read();
		Serial.print("I received: ");
		Serial.println(incomingByte, DEC);
 
    if (incomingByte != prev){
      prev = incomingByte;
      
      if (incomingByte == 114){
        reset();
        digitalWrite(RED, HIGH);
      }  
      
      if (incomingByte == 103){
        reset();
        digitalWrite(GREEN, HIGH);
      }  
      
      if (incomingByte == 111){
        reset();
        digitalWrite(ORANGE, HIGH);
      }  
      
      if (incomingByte == 120){
        reset();
      }  
      
    }      	
  }
  delay(1000);
}