#define LED1 13
#define LED2 12
#define LED3 11
#define LED4 10
int x;
void setup() {
  pinMode(LED1,OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  Serial.begin(9600);
  Serial.println();
}
void loop() {
  if (Serial.available() > 0)
  {
    x=Serial.read();
    if(x==10) return;
   if( x=='a')
    {
      digitalWrite(LED1, HIGH);
      Serial.println("Data is->a");
    }
    else if(x=='b')
    {
      digitalWrite(LED1, LOW);
      Serial.println("Data is->b");
    }
     if(x=='c')
    {
      digitalWrite(LED2, HIGH);
      Serial.println("Data is->c");
    }
    else if(x=='v')
    {
      digitalWrite(LED2, LOW);
      Serial.println("Data is->v");
    }
     if(x=='n')
    {
      digitalWrite(LED3, HIGH);
      Serial.println("Data is->n");
    }
    else if(x=='m')
    {
      digitalWrite(LED3, LOW);
      Serial.println("Data is->m");
    }
     if(x=='h')
    {
      digitalWrite(LED4, HIGH);
      Serial.println("Data is->h");
    }
    else if(x=='g')
    {
      digitalWrite(LED4, LOW);
      Serial.println("Data is->g");
    }
  }
  }