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// Sweep
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// by BARRAGAN <http://barraganstudio.com> 
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// This example code is in the public domain.
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#include <Servo.h> 
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Servo myservo;  // create servo object to control a servo 
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                // a maximum of eight servo objects can be created 
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int pos = 0;    // variable to store the servo position 
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void setup() 
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{ 
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  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
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} 
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void loop() 
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{ 
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  for(pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees 
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  {                                  // in steps of 1 degree 
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    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
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    delay(15);                       // waits 15ms for the servo to reach the position 
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  } 
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  for(pos = 180; pos>=1; pos-=1)     // goes from 180 degrees to 0 degrees 
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  {                                
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    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
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    delay(15);                       // waits 15ms for the servo to reach the position 
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  } 
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}