#include <Ultrasonic.h>

int pino_Buzzer = 2;
int pino_Trig = 3;
int pino_Echo = 4;
int pino_Led = 5;

Ultrasonic Sensor(pino_Trig, pino_Echo);

int distancia;

#define frequencia 3500

void setup() {
  // put your setup code here, to run once:
  pinMode(pino_Buzzer, OUTPUT);
  pinMode(pino_Led,OUTPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  distancia = Sensor.read();
  if(distancia < 80 && distancia > 50){
    tone(pino_Buzzer, frequencia, 100);
    digitalWrite(pino_Led, HIGH);
    delay(300);
    digitalWrite(pino_Led, LOW);
    delay(300);
    delay(1000);
  }

  if(distancia < 50 && distancia > 30){
    tone(pino_Buzzer, frequencia, 100);
    digitalWrite(pino_Led, HIGH);
    delay(200);
    digitalWrite(pino_Led, LOW);
    delay(200);
    delay(700);
  }

  if(distancia < 30 && distancia > 20){
    tone(pino_Buzzer, frequencia, 100);
    digitalWrite(pino_Led, HIGH);
    delay(100);
    digitalWrite(pino_Led, LOW);
    delay(100);
    delay(300);
  }

  if(distancia < 20 && distancia > 10){
    tone(pino_Buzzer, frequencia, 100);    
    digitalWrite(pino_Led, HIGH);
    delay(50);
    digitalWrite(pino_Led, LOW);
    delay(50);
    delay(150);
  }

    if(distancia < 10){
    tone(pino_Buzzer, frequencia);
    digitalWrite(pino_Led, HIGH);
  }
}