#include <Servo.h>

Servo m1;
void setup() {
  // put your setup code here, to run once:
  m1.attach(3);
  m1.write(90);
  delay(3000);
  m1.write(180);
  delay(3000);
  m1.write(0);


}

void loop() {
  // put your main code here, to run repeatedly:
   for(int i= 544 ;i < 2400 ;i++){
    m1.writeMicroseconds(i);
    delay(5);

  }
  for(int i= 2400 ;i > 544 ;i--){
    m1.writeMicroseconds(i);
    delay(5);

  }

}