int ledm = 13;
int ledy = 12;
int ledj = 11;
int buzzer = 10;
int potpin = A0;
int value;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ledm, OUTPUT);
pinMode(ledy, OUTPUT);
pinMode(ledj, 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(ledj, HIGH);  
}
else{
  digitalWrite(ledj, LOW);
}
if(value > 400){
  digitalWrite(ledy, HIGH);  
}
else{
  digitalWrite(ledy, LOW);
}
if(value > 800){
  digitalWrite(ledm, HIGH);  
}
else{
  digitalWrite(ledm, LOW);
}
}