#include <Servo.h>

#define led1 11
#define led2 13

Servo Myservo1;
int tm=0;

void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  Myservo1.attach(3);
  Myservo1.write(90);
//  pinMode(2, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly: 
  
    Myservo1.write(tm);
    digitalWrite(led1, HIGH); 
    digitalWrite(led2, LOW); 
    delay(1000);
    digitalWrite(led1, LOW); 
    digitalWrite(led2, HIGH);     
    delay(1000);
    tm += 20;
    if (tm>180)  tm = 0;

}