Sliding Arm

Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4;

int ON = 8;
int L= A1;
int R= A0;
char val; 
boolean encendido = false; 

void setup()
{
servo1.attach(11);
servo2.attach(10);
servo3.attach(9);
servo4.attach(6);

servo1.write(5);  //ready
   delay(950); 
servo2.write(80);  //ready
   delay(950); 
servo3.write(90);  //ready
   delay(950); 
servo4.write(95);  //ready
       delay(950); 

     
       

Serial.begin(9600);  
pinMode (ON,OUTPUT); 
pinMode (L,OUTPUT); 
pinMode (R,OUTPUT); 
digitalWrite(ON, LOW);
 digitalWrite(L,LOW);
 digitalWrite(R,LOW);
 

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

if ((val == 'P')&&(encendido == false)){  
  digitalWrite(ON, HIGH); 
  encendido = true;  
}else if ((val == 'P')&&(encendido == true)){
  digitalWrite(ON, LOW); 
  encendido = false; //  
 
 
 }
if ((val == 'I')&&(encendido == false)){  
  digitalWrite(L, HIGH); 
  encendido = true;  
}else if ((val == 'I')&&(encendido == true)){
  digitalWrite(L, LOW); 
  encendido = false; //  
 }

if ((val == 'O')&&(encendido == false)){  
  digitalWrite(R, HIGH); 
  encendido = true;  
}else if ((val == 'O')&&(encendido == true)){
  digitalWrite(R, LOW); 
  encendido = false; //  
 }
 
if (val == 'W') {

servo1.write(10);  //1
       
 }  

if (val == 'E') {

servo1.write(120);  //1
       
}
if (val == 'A') {

servo2.write(10);  //2
        
 }     

if (val == 'S') {

servo2.write(90);  //2
       
}
if (val == 'D') {

servo2.write(140);  //2 
      
 }      

if (val == 'B') {

servo3.write(15);  //3
       
}
if (val == 'N') {

servo3.write(90);  //3
              
  }      

if (val == 'V') {

servo3.write(145);  //3
       
}
if (val == 'Z') {

servo4.write(10);  //4
       
  
}
if (val == 'X') {

servo4.write(90);  //4
     
}
if (val == 'C') {

servo4.write(160);  //4
 }             
}
}