Wireless CopyBot

#include <SoftwareSerial.h>
SoftwareSerial BT(10, 11); //TX, RX respetively
String COMMAND;
void setup() {
 BT.begin(9600);
 Serial.begin(9600); // setting baud rate to 9600
  pinMode (2, OUTPUT);
  pinMode (3, OUTPUT);
  pinMode (4, OUTPUT);
  pinMode (5, OUTPUT);
  pinMode (6, OUTPUT);
  pinMode (7, OUTPUT);
  pinMode (8, OUTPUT);
  pinMode (9, OUTPUT);
}
void loop() {
  while (BT.available()){   //Check if there is an available byte to read
  delay(10); //Delay added to make thing stable
  char c = BT.read(); //Conduct a serial read
  COMMAND += c; //build the string- “forward”, “reverse”, “left” and “right”
  }
  if (COMMAND.length() > 0) {
    Serial.println(COMMAND);
    if(COMMAND == “forward”)
  {
    digitalWrite(8, HIGH);
    digitalWrite (9, HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    digitalWrite(2, HIGH);
    digitalWrite (3, HIGH);
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
    delay(100);
  }
  else if(COMMAND == “reverse”)
  {
    digitalWrite(8, LOW);
    digitalWrite (9, LOW);
    digitalWrite(6,HIGH);
    digitalWrite(7,HIGH);
    digitalWrite(2, LOW);
    digitalWrite (3, LOW);
    digitalWrite(4,HIGH);
    digitalWrite(5,HIGH);
    delay(100);
  }
  else if (COMMAND == “right”)
  {
    digitalWrite(8, LOW);
    digitalWrite (9, HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    digitalWrite(2, LOW);
    digitalWrite (3, HIGH);
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
    delay (100);
  }
 else if ( COMMAND == “left”)
 {
   digitalWrite(8, HIGH);
    digitalWrite (9, LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    digitalWrite(2, HIGH);
    digitalWrite (3, LOW);
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
   delay (100);
 }
 else if (COMMAND == “stop”)
 {
digitalWrite(8, LOW);
    digitalWrite (9, LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    digitalWrite(2, LOW);
    digitalWrite (3, LOW);
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
   delay (100);
 }
COMMAND=””;}} //Reset the variable