int ledp = 10;
int ledo = 11;
int ledk = 12;
int ledm = 13;
int buzzer = 9;

int potpin = A0;
int value;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(ledp, OUTPUT);
  pinMode(ledo, OUTPUT);
  pinMode(ledk, OUTPUT);
  pinMode(ledm, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(potpin, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  value = analogRead(potpin);
  tone(buzzer, value);

  if(value > 200){
    digitalWrite(ledp, HIGH);
  }else{
    digitalWrite(ledp, LOW);
  }

  if(value > 400){
    digitalWrite(ledo, HIGH);
  }else{
    digitalWrite(ledo, LOW);
  }

  if(value > 600){
    digitalWrite(ledk, HIGH);
  }else{
    digitalWrite(ledk, LOW);
  }

  if(value > 800){
    digitalWrite(ledm, HIGH);
  }else{
    digitalWrite(ledm, LOW);
  }
}