아두이노 컴파일 오류가 뜨네요ㅠㅠㅠㅠㅠ

#define USE_ARDUINO_INTERRUPTS true
#include <PulseSensorPlayground.h>
#define button 2
#define buzzer 8
#include "pitches.h"
const int PulseWire = 0;
int Threshold = 550;
PulseSensorPlayground pulseSensor;
#include <HuemonelabKit.h>
RGBLed rgb(11,12,13);

int dustPin = A0; 
int ledPower = 10; 

int samplingTime = 280; 
int deltaTime = 40; 
int sleepTime = 9680;

float voMeasured = 0; 
float calcVoltage = 0; 
float dustDensity = 0; 

int bt=4;

void setup(){
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT); 
  pinMode(buzzer,OUTPUT);
  pinMode(button,INPUT);
  pinMode(bt,INPUT);
  attachInterrupt(0,blink,RISING);
  Serial.begin(9600);
  pulseSensor.analogInput(PulseWire);
  pulseSensor.setThreshold(Threshold);
  if(pulseSensor.begin()){
   Serial.println("We created a pulseSensor Object ! ");
  }
 }

void loop(){
  int myBPM = pulseSensor.getBeatsPerMinute();
   if(pulseSensor.sawStartOfBeat()){
  Serial.println("♥ A HeartBeat Happened ! ");
  Serial.print("BPM: ");
  Serial.println(myBPM);
 }
  if(pulseSensor.sawStartOfBeat()==0){
    delay(30000);
    tone(8,NOTE_G4,10000);
  }

  if (digitalRead(bt==HIGH)){
  digitalWrite(ledPower,LOW); 
  delayMicroseconds(samplingTime);
  voMeasured = analogRead(dustPin); 
  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH);
  delayMicroseconds(sleepTime);

 
calcVoltage = voMeasured*(5.0/1024.0);
dustDensity = (0.17*calcVoltage-0.1)*1000;

  if (digitalRead(bt==HIGH)){
   Serial.println(dustDensity);
   delay(2000);
  
   if ( dustDensity > 150 ) {
     rgb.setColor(255,0,0);
   } 
    else if ( dustDensity > 80) {
     rgb.setColor(255,255,0);
   } 
    else if ( dustDensity > 30) {
     rgb.setColor(0,255,0);
   } 
    else {
     rgb.setColor(0,0,255);
   }
   delay(10000);
   rgb.setColor(0,0,0); 
   }
  }
}

void blink(){
  noTone(buzzer);
  delay(1000000000);

}