#define LED1 8
#define LED2 9
#define LED3 10
#define LED4 11
#define LED5 12
#define LED6 13

void setup()
{
  for(int i = 8; i<=13; i++){
    pinMode(i, OUTPUT);
  }
}
void loop()

{ int level = analogRead(A0);

  digitalWrite(LED1, level > 520);
  digitalWrite(LED2, level > 540);
  digitalWrite(LED3, level > 560);
  digitalWrite(LED4, level > 580);
  digitalWrite(LED5, level > 600);
  digitalWrite(LED6, level > 620);

  delay(10);
}