Xbee multiple data

Using Arduino Networking, Protocols, and Devices
1

I am having trouble trying to send/read multiple data using serial. I have 2 xbee series 1s that are connected to arduinos with a wireless shield. I have been trying to figure out how to read multiple data from serial but have been having problems.

The sender has 3 switches, which I want to turn on an led on the receiver. I just want to send 3 0/1s and have the receiver read this data. I have already had success with using 1 button and 1 led.

Sender:

int button1pin = 11;
int button2pin = 10;
int button3pin = 9;

int button1state = 0;
int button2state = 0;
int button3state = 0;

void setup() {
  Serial.begin(9600);
  pinMode(button1pin, INPUT);
  pinMode(button2pin, INPUT);
  pinMode(button3pin, INPUT);
}

void loop() {
  button1state = digitalRead(button1pin);
  button2state = digitalRead(button2pin);
  button3state = digitalRead(button3pin);
  Serial.write(button1state);
  Serial.write(button2state);
  Serial.write(button3state);
  delay(10);
}

Receiver:

int led1pin = 6;
int led2pin = 5;
int led3pin = 4;
int led4pin = 3;

int dataArray[] = {0, 0, 0};
byte inByte = 0;

void setup() {
  Serial.begin(9600);
  pinMode(led1pin, OUTPUT);
  pinMode(led2pin, OUTPUT);
  pinMode(led3pin, OUTPUT);
  pinMode(led4pin, OUTPUT);
}

void loop() {
  while(Serial.available() < 3) {
    for(int i = 0; i < 3; i++) {
      inByte = Serial.read();
      dataArray[i] = inByte;
    }
  }
  if(dataArray[0] == 1) {
      digitalWrite(led1pin, HIGH);
    } else {
      digitalWrite(led1pin, LOW);
    }
    if(dataArray[1] == 1) {
      digitalWrite(led2pin, HIGH);
    } else {
      digitalWrite(led2pin, LOW);
    }
    if(dataArray[2] == 1) {
      digitalWrite(led3pin, HIGH);
    } else {
      digitalWrite(led3pin, LOW);
    }
  inByte = 0;
  delay(10);
}
2 
  Serial.write(button1state);
  Serial.write(button2state);
  Serial.write(button3state);

Withoutanykindofdelimiter,howisthereceiversupposedtoknowwhentheendofapackethasbeenreached

  while(Serial.available() < 3) {
    for(int i = 0; i < 3; i++) {
      inByte = Serial.read();
      dataArray[i] = inByte;
    }
  }

Isn't 0 less than 3? If there is nothing to read, read three bytes. Does that really seem like a good idea?