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(ledp, HIGH); 
         }
         else{
          digitalWrite(ledp, LOW);
          }
          }