Arduino code

#include <Servo.h>

Servo bjservo;
Servo bjservo2;
Servo mjservo;
Servo tjservo;
Servo gripservo;

int bjval = 0;
int mjval = 0;
int tjval = 179;
int gripval = 179;

const unsigned int BAUD_RATE = 9600;
char w = 0;

void setup()
{
  bjservo.attach(7);
  bjservo2.attach(6);
  mjservo.attach(5);
  tjservo.attach(4);
  gripservo.attach(3);
  bjservo.write(bjval);
  bjservo2.write(179-bjval);
  mjservo.write(mjval);
  tjservo.write(tjval);
  gripservo.write(gripval);
  Serial.begin(9600);
}

void loop()
{

  if (Serial.available()) {
    w = Serial.read();
    if (w == 'w'||w == 'W')
    {
      (bjval=bjval-1);
      bjservo.write(bjval);
      bjservo2.write(179-bjval);
      delay(15);
    }
    else if (w == 's'||w == 'S')
    {
     (bjval=bjval+1);
      bjservo.write(bjval);
      bjservo2.write(179-bjval);
      delay(15);
    }
    else if (w == 'a'||w == 'A')
    {
      (mjval=mjval-1);
      mjservo.write(mjval);
      delay(15);
    }
    else if (w == 'd'||w == 'D')
    {
      (mjval=mjval+1);
      mjservo.write(mjval);
      delay(15);
    }
    else if (w == 'k'||w == 'K')
    {
      (gripval=gripval-1);
      gripservo.write(gripval);
      delay(15);
    }
    else if (w == 'i'||w == 'I')
    {
      (gripval=gripval+1);
      gripservo.write(gripval);
      delay(15);
    }
    else if (w == 'j'||w == 'J')
    {
      (tjval=tjval-1);
      tjservo.write(tjval);
      delay(15);
    }
    else if (w == 'l'||w == 'L')
    {
      (tjval=tjval+1);
      tjservo.write(tjval);
      delay(15);
    }
}
}