HOw DO I add servo to this sketch

hi im wondering how add servo sketch
thanks


#include <newping.h> 

#define trigger_pin  3 
#define echo_pin    2   
#define max_distance 100

const int motor1pin1 = 8;
const int motor1pin2 = 9;
const int motor2pin2 =10;
const int motor2pin1 = 11;


newping sonar(trigger_pin, echo_pin, max_distance);

unsigned int time;          
int distance;               
int triggerdistance = 30;   
int fdistance;              
int ldistance;
int rdistance;


void setup()
{
  pinmode(motor1pin1, output);   
  pinmode(motor1pin2, output);   
  pinmode(motor2pin1, output);   
  pinmode(motor2pin2, output);
}

void loop()
{
  scan();                              
  fdistance = distance;                
  if(fdistance < triggerdistance){   
   movebackward();                    
   delay(1000);
   moveright();                       
   delay(500);
   movestop();                        
   scan();                           
   rdistance = distance;              
   moveleft();
   delay(1000);                       
   movestop();                       
   scan();                           
   ldistance = distance;             
   if(ldistance < rdistance){         
     moveright();                    
     delay(200);
     moveforward();                  
   }
   else{
     moveforward();                   
   }
  }
  else{
   moveforward();                    
  }
}

void scan(){
  time = sonar.ping();                
  distance = time / us_roundtrip_cm;   
  if(distance == 0){                  
   distance = 100;                   
  }
  delay(10);
}

void movebackward(){
  digitalwrite(motor1pin1, low);
  digitalwrite(motor1pin2, high);
  digitalwrite(motor2pin1, low);
  digitalwrite(motor2pin2, high);
}

void moveforward(){
  digitalwrite(motor1pin1, low);
  digitalwrite(motor1pin2, high);
  digitalwrite(motor2pin1, low);
  digitalwrite(motor2pin2, high);
}

void moveright(){
  digitalwrite(motor1pin1, low);
  digitalwrite(motor1pin2, high);
  digitalwrite(motor2pin1, low);
  digitalwrite(motor2pin2, high);
}

void moveleft(){
  digitalwrite(motor1pin1, low);
  digitalwrite(motor1pin2, high);
  digitalwrite(motor2pin1, low);
  digitalwrite(motor2pin2, high);
}

void movestop(){
  digitalwrite(motor1pin1, low);
  digitalwrite(motor1pin2, low);
  digitalwrite(motor2pin1, low);
  digitalwrite(motor2pin2, low);
}

include servo library , create instance:

code: [select]


#include <servo.h>

servo myservo;


or wanting servo something? 

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