#include <Servo.h>
Servo myservo;
void setup() {
  //Serial.begin(115200);
  // put your setup code here, to run once:
pinMode(6,OUTPUT);
pinMode(12,INPUT);
pinMode(11,INPUT);
pinMode(13,OUTPUT);
myservo.attach(10);

}
unsigned long tl=0, tb=0;
const long i=1000;
boolean c=0;
void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(11)||digitalRead(12)){
    myservo.write(90);
    tb=millis();
    if(tb-tl>=i){
      tl=tb;
      c=!c;
    }
    if (c==1){ 
      tone(6,450);
      delay(10);
      digitalWrite(13,HIGH);
    }
    else {
      tone(6,670);
      delay(10);
      digitalWrite(13,LOW);
    }/*
    Serial.print("tb: ");
    Serial.print(tb);
    Serial.print("\t tl:");
    Serial.println(tl);*/
  }
  else{
    noTone(6);
    myservo.write(0);
    digitalWrite(13,LOW);
  }
}