Edit: I have tried this state machine in Arduino : It accepts those data and according to it, it should bi color LED light. But not working properly. Not lighting up anything

//int currState;
//int reChk, data, confirm;
const int pingPin = 13;
int inPin = 12;

void setup()  
{
  Serial.begin(9600);
    // initialize digital pin 13 as an output.
  pinMode(32, OUTPUT);
  pinMode(34, OUTPUT); 
  
  digitalWrite(32, LOW);   
  digitalWrite(34, LOW);
  //currState = 0;
  //reChk = 0;
  //confirm = -1;
  
  
}

void loop() // run over and over
{
  static int currState = 0, reChk = 0, confirm = -1;
  int data;
  if(reChk == 0)
  {
    //ultrasonic();
    if(Serial.available())
    data = Serial.read();
    else
    currState = 5;
  }
  
  switch(currState)
  {
    
    case 0:
    reChk = 0;
    if(data == 78)
      currState = 1;
    else
      currState = 0;
    break;
    
    
    case 1:
    reChk = 0;
    if(data == 32)
    currState = 2;
    else
    {
      currState = 0;
      reChk = 1;
    }
    break;
    
    
    case 2:
    reChk = 0;
    switch(confirm)
    {
      case -1 :
      confirm = data;
      currState = 3;
      break;
      case 0 :
            digitalWrite(32, LOW);   
            digitalWrite(34, LOW);
            delay(10); 
      confirm = -1;
      currState = 0;
      break;
      case 1 :
            digitalWrite(34, HIGH);   
            digitalWrite(32, LOW);
            delay(10);
      confirm = -1;
      currState = 0;
      break;
      case 2 :
            digitalWrite(32, HIGH);   
            digitalWrite(34, LOW);
            delay(10); 
      confirm = -1;
      currState = 0;
      break;
      default :
      confirm = -1;
      reChk = 1;
      currState = 0;
    }
    
    
    case 3:
    reChk = 0;
    if(data == 20)
    {
      reChk = 1;
      currState = 2;
    }
    else
    {
      confirm = -1;
      currState = 0;
    }
    break;
    
    default:
    reChk = 0;
    currState = 0;
    confirm = -1;
  }
  delay(10);
}

void ultrasonic () //ultrasonic
{
      const int pingPin = 13;
      int inPin = 12;
      //raw duration in milliseconds, cm is the
      //converted amount into a distance
      long duration, cm;
    
      //initializing the pin states
      pinMode(pingPin, OUTPUT);
      //pinMode(greenLed, OUTPUT);
      //pinMode(redLed, OUTPUT); 
    
      //sending the signal, starting with LOW for a clean signal
      digitalWrite(pingPin, LOW);
      delayMicroseconds(2);
      digitalWrite(pingPin, HIGH);
      delayMicroseconds(5);
      digitalWrite(pingPin, LOW);
    
      //setting up the input pin, and receiving the duration in
      //microseconds for the sound to bounce off the object infront
      pinMode(inPin, INPUT);
      duration = pulseIn(inPin, HIGH);
    
      // convert the time into a distance
      cm = microsecondsToCentimeters(duration);
      
      if(cm > 50)
      {
      //printing the current readings to ther serial display
      Serial.print("5");
      }
      else
      {
      Serial.print("0");
      }
      //Serial.print("cm");
      //Serial.println();
    
      //checking if anything is within the safezone, if not, keep
      //green LED on if safezone violated, activate red LED instead
      //if (cm > safeZone)
      //{
      //  digitalWrite(greenLed, HIGH);
      //  digitalWrite(redLed, LOW);
      //}
      //else
      //{
      //  digitalWrite(redLed, HIGH);
      //  digitalWrite(greenLed, LOW);
      //}

delay(1000);
}

long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
   return microseconds / 29 / 2;
}