#include <Servo.h>

Servo myServo1 ; // create object
Servo myServo2 ; 

void setup() {
 
 myServo1.attach(9) ; 
 myServo2.attach(10) ;

 delay(1000) ;
}

void loop() {

 for (int j=0 ; j <=160 ; j++ ) {
 myServo1.write(j) ;  // j is the angle
 myServo2.write(j) ; 
 delay(50) ;  
 }
 
 for (int m=160 ; m >=0 ; m-- ) {
 myServo1.write(m) ;  // m is the angle
 myServo2.write(m) ;  
 delay(50) ;  
 }    
}