#include <Servo.h>
Servo myServo;
int  pos=0;





void setup() {
  myServo.attach(9);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);



}

void loop() {
for(pos=0;pos<=180;pos+=1){/// positon 0
  if(pos==0){digitalWrite(13, HIGH);}else{digitalWrite(13, LOW);}
 if(pos==90){digitalWrite(12, HIGH);}else{digitalWrite(12, LOW);}
 if(pos==180){digitalWrite(11, HIGH);}else{digitalWrite(11, LOW);}
myServo.write(pos);
delay(10);
}

for(pos=180;pos>=0;pos-=1){ // positon 180
  if(pos==0){digitalWrite(13, HIGH);}else{digitalWrite(13, LOW);}
 if(pos==90){digitalWrite(12, HIGH);}else{digitalWrite(12, LOW);}
 if(pos==180){digitalWrite(11, HIGH);}else{digitalWrite(11, LOW);}
myServo.write(pos);
delay(10);
}

}