int sensorValue = 0;
int led1=2,led2=5,led3=9,led4=13;

void setup() 
{
    
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  pinMode(led3,OUTPUT);
  pinMode(led4,OUTPUT);

}

void loop() 
{
  sensorValue=analogRead(A0);
  sensorValue=map(sensorValue,0,1023,0,4);

  delay(100);

  if (sensorValue==0){
    
    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    digitalWrite(led4,LOW);
  }

  if (sensorValue==1){
    
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    digitalWrite(led4,LOW);
  }

  if (sensorValue==2){

    digitalWrite(led1,LOW);
    digitalWrite(led2,HIGH);
    digitalWrite(led3,LOW);
    digitalWrite(led4,LOW);

  }

  if (sensorValue==3){

    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,HIGH);
    digitalWrite(led4,LOW);
  }
  
  if (sensorValue==4){

    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    digitalWrite(led4,HIGH);
  }
  
}