int rba;
int M1 = 0;
int M2 = 1;
int M3 = 2;
int M4 = 3;

int spd1 = 4;
int spd2 = 5;

int ik1 = 6;
int ik2 = 7;
int ik3 = 8;
int ik4 = 9;

int pol1 = 10;
int pol2 = 11;
int pol3 = 12;
int pol4 = 13;

void setup()
{
  pinMode(M1,OUTPUT);
  pinMode(M2,OUTPUT);
  pinMode(M3,OUTPUT);
  pinMode(M4,OUTPUT);

  pinMode(spd1,OUTPUT);
  pinMode(spd2,OUTPUT);

  pinMode(ik1,INPUT);
  pinMode(ik2,INPUT);
  pinMode(ik3,INPUT);
  pinMode(ik4,INPUT);

  pinMode(pol1,INPUT);
  pinMode(pol2,INPUT);
  pinMode(pol3,INPUT);
  pinMode(pol4,INPUT);
}

void loop()
{
  if (Serial.available())
    {
      rba = Serial.read();


     if (rba == 'W')              // bluetooth
    {
      digitalWrite(M1,HIGH);
      digitalWrite(M2,LOW);
      analogWrite(spd1,255);
      digitalWrite(M3,HIGH);
      digitalWrite(M4,LOW);
      analogWrite(spd2,255);
    }
    if (rba == 'S')
    {
      digitalWrite(M1,LOW);
      digitalWrite(M2,HIGH);
      analogWrite(spd1,255);
      digitalWrite(M3,LOW);
      digitalWrite(M4,HIGH);
      analogWrite(spd2,255);
    }
    if (rba == 'A')
    {
      digitalWrite(M1,LOW);
      digitalWrite(M2,HIGH);
      analogWrite(spd1,255);
      digitalWrite(M3,HIGH);
      digitalWrite(M4,LOW);
      analogWrite(spd2,255);
    }
    if (rba == 'D')
    {
      digitalWrite(M1,HIGH);
      digitalWrite(M2,LOW);
      analogWrite(spd1,255);
      digitalWrite(M3,LOW;
      digitalWrite(M4,HIGH);
      analogWrite(spd2,255);
    }
    if (rba == 'X')
    {
      digitalWrite(M1,LOW);
      digitalWrite(M2,LOW);
      analogWrite(spd1,255);
      digitalWrite(M3,LOW;
      digitalWrite(M4,LOW);
      analogWrite(spd2,255);
    }

      if (rba == 'E')
    {
             if (digitalRead(ik1) == LOW)    // ik
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW;
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }

          if (digitalRead(ik2) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW;
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(ik3) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW;
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(ik4) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW);
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(pol1) == LOW)              //  pol
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW);
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(pol2) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW;
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(pol3) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW);
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }
          if (digitalRead(pol4) == LOW)
          {
            digitalWrite(M1,LOW);
            digitalWrite(M2,LOW);
            analogWrite(spd1,255);
            delay(1000);
            digitalWrite(M3,LOW);
            digitalWrite(M4,LOW);
            analogWrite(spd2,255);
            delay(1000);
          }


    }






  }

}