#include <SoftwareSerial.h>
#define Enable1 9
#define IN1 4
#define IN2 2
SoftwareSerial myBLUETOOTH(8,10);//RX then TX
 char state = 0;
  char dir;
 void setup() {
    myBLUETOOTH.begin(9600);
    pinMode(Enable1,OUTPUT);
   pinMode(IN1,OUTPUT);
   pinMode(IN2,OUTPUT);
   analogWrite(Enable1, 255);
 }
void loop (){

    if(myBLUETOOTH.available()){
      dir = myBLUETOOTH.read();
      
      if (dir == 'F'){
      digitalWrite(IN1,LOW);
      digitalWrite(IN2,HIGH);
      delay(4000);
      digitalWrite(IN1,LOW);
      digitalWrite(IN2,LOW);
      }
      
      if (dir == 'R'){
      digitalWrite(IN1,HIGH);
      digitalWrite(IN2,LOW);
      delay(4000);
      digitalWrite(IN1,LOW);
      digitalWrite(IN2,LOW);
      }}}