#include<Servo.h> // include server library
Servo ser1;// create servo object to control a servo
Servo ser2;// create servo object to control a servo
Servo ser3;// create servo object to control a servo
Servo ser4;// create servo object to control a servo
int poser = 0; // initial position of servo
char val; // data received from the serial port

void setup() {
  Serial.begin(9600); // Serial comm begin at 9600 bps
  ser1.attach(11);// servo is connected at pin 9
  ser2.attach(10);// servo is connected at pin 8
  ser3.attach(9);// servo is connected at pin 7
  ser4.attach(8);// servo is connected at pin 6
}

void loop() {
  if (Serial.available()) // if serial value is available 
  {
    val = Serial.read();// then read the serial value

   
    //Left/Right
    if (val == '1') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (left)
      ser1.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
     }
    if (val == '2') //if value input is equals to 2
    {
      poser -= 3; //the position of servo motor decreases by 3 (right)
      ser1.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }


    //Up/Down
    if (val == '3') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (up)
      ser2.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }
      if (val == '4') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (down)
      ser2.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }


    //Front/Back
    if (val == '5') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (front)
      ser3.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }
    if (val == '6') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (back)
      ser3.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }


    //Open/Close
    if (val == '7') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (open)
      ser4.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }
    if (val == '8') //if value input is equals to 1
    {
      poser += 3; //the position of servo motor increases by 3 (close)
      ser4.write(poser);// the servo will move according to position 
      delay(15);//delay for the servo to get to the position
    }
        
  }
}

import processing.serial.*;
 
 Serial myPort;
 
 void setup(){
 size(400, 300);
 //println((Object[])Serial.list());
 myPort = new Serial(this, Serial.list()[4], 9600); 
 }
 
 void draw(){}
 
void keyPressed() {
 if (key == CODED) {
    if (keyCode == LEFT) {
       myPort.write('1'); // send 1 to the serial port
       println("left");
}
   
 else if (keyCode == RIGHT){
       myPort.write('2'); // send 2 to the serial port 
       println("right");
}
 else if (keyCode == UP) {
       myPort.write('3'); // send 3 to the serial port
       println("up");
}
else if (keyCode == DOWN) {
       myPort.write('4'); // send 4 to the serial port
       println("down");
}
else if (keyCode == DELETE) {
       myPort.write('5'); // send 5 to the serial port
       println("front");
}
else if (keyCode == ENTER) {
       myPort.write('6'); // send 6 to the serial port
       println("back");
}
else if (keyCode == SHIFT) {
       myPort.write('7'); // send 7 to the serial port
       println("open");
}
else if (keyCode == ALT) {
       myPort.write('8'); // send 8 to the serial port
       println("close");
}

}
 println(myPort.readStringUntil('\n'));
}