#include <Arduino.h>
const int buzzer = 26;
const int led1 = 2;
const int led2 = 4;
const int led3 = 5;
void setup() {
pinMode(buzzer, OUTPUT);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
}
void loop() {
digitalWrite(led1, HIGH);
tone(buzzer, 1000); // Play a 1 kHz tone on the buzzer
delay(500);
digitalWrite(led1, LOW);
noTone(buzzer); // Turn off the buzzer
delay(500);
digitalWrite(led2, HIGH);
tone(buzzer, 1500);
delay(500);
digitalWrite(led2, LOW);
noTone(buzzer);
delay(500);
digitalWrite(led3, HIGH);
tone(buzzer, 2000);
delay(500);
digitalWrite(led3, LOW);
noTone(buzzer);
delay(500);
}