Arduino-WiFi-Android-Remote-Car

#include <Servo.h> 
   
Servo servo1; 
Servo servo2; 
int x = 90;
int y = 90;
void setup()   
{  
  Serial.begin(38400); 
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);

}   
  
void loop()   
{  
   switch(Serial.read())
{
   case 'a':   
   digitalWrite(2, HIGH);
   break;
 case 'b':   
   digitalWrite(3, HIGH);
   break;
 case 'c':   
   digitalWrite(4, HIGH);
   break;
 case 'z':   
   digitalWrite(5, HIGH);
   break;
 case 'e':   
   digitalWrite(2, LOW);
   break;
 case 'f':   
   digitalWrite(3, LOW);
   break;
 case 'g':   
   digitalWrite(4, LOW);
   break;
 case 'h':   
   digitalWrite(5, LOW);
   break;
case 'i':   
servo1.attach(9);  
servo1.write(x);  
x++; 
break;

case 'j':   
servo1.attach(9);  
servo1.write(x); 
x--; 
break;


case 'k':   
servo2.attach(10);  
servo2.write(y); 
y++;
break;

case 'l':   
servo2.attach(10);  
servo2.write(y); 
y--;
break;

case 'm':   
servo1.detach();
break;

case 'n':   
servo2.detach();
break;

}
}