Flatland Arduino serial test

gistfile1.c

void toggleLed();
String inString = ""; 
boolean keepReading = false;
const int ledPin =  13;
const int irTarget = 2; 
int ledState = LOW;
unsigned long previousMillis = 0; 
long interval = 0; 
const int player = 'A';


void setup()
{
  Serial1.begin(9600);
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(irTarget, OUTPUT); 

}

void loop()
{
  //  digitalWrite(13, 0);
  digitalWrite(ledPin, HIGH);
  digitalWrite(irTarget, HIGH);

  while(Serial1.available())
  {
    int inChar = Serial1.read();
    if(inChar == player){
      keepReading = true;
      Serial.println("found dollar");
    }
    if (isDigit(inChar) && keepReading == true) {
      // convert the incoming byte to a char 
      // and add it to the string:
      inString += (char)inChar; 
      Serial.println("found digit while keepReading was true");
    }
    if(inChar == '\n'){
      
      interval = inString.toInt();
      Serial.println(interval);
      digitalWrite(ledPin, LOW);
      digitalWrite(irTarget, LOW);
      delay(interval);

      inString = "";
      keepReading = false;
    }

  }

}