consider
#include <Servo.h>
Servo myservo;
int pos = 0;
int dir = 1;
const int LED1 = 13; // leg for 0 ged
const int LED2 = 12; // leg for 180 deg
void setup() {
myservo.attach(9);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
}
void loop() {
pos += dir;
myservo.write(pos);
if (180 <= pos) {
dir = -dir;
digitalWrite (LED1, HIGH);
digitalWrite (LED2, LOW);
}
else if (0 >= pos) {
dir = -dir;
digitalWrite (LED1, LOW);
digitalWrite (LED2, HIGH);
}
delay (15);
}