int ledp = 10;
int ledo = 11;
int ledk = 12;
int ledm = 13;
int buzzer = 9;
int potpin = A0;
int value;
void setup() {

Serial.begin(9600);
pinMode(ledp, OUTPUT);
pinMode(ledo, OUTPUT);
pinMode(ledk, OUTPUT);
pinMode(ledm, OUTPUT);
pinMode(buzzer, OUTPUT);
pinMode(potpin, INPUT);
}

void loop(){

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);
}
}