180 degree sliding servo

// Include the Servo library
#include <Servo.h>
// Declare the Servo pin
int servoPin = 3;
// Create a servo object
Servo Servo1;
void setup() {
// We need to attach the servo to the used pin number
   Servo1.attach(servoPin);
}
void loop(){
for(int i = 0; i <= 180; i++)
   {Servo1.write(i);
     delay(200);
   }
for(int i = 180; i >= 0; i--)
   {Servo1.write(i);
     delay(200);
   }
}