int led = 4;
int buzzer = 5;
int button_h = 3;
int button_b = 2;


void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
pinMode(buzzer, OUTPUT);
pinMode(button_h, INPUT);
pinMode(button_b, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  //buzzer
  if (digitalRead(button_h)==HIGH){
    digitalWrite(buzzer, HIGH);
    tone(buzzer,100,100);
   }else{
    digitalWrite(led, LOW);
   }
  delay(500);


//led
if(digitalRead(button_b)==HIGH){
  digitalWrite (led, HIGH);
  delay(300);
  }else{
  digitalWrite (led, LOW);
  }
delay(500);
}