void setup() {
  // put your setup code here, to run once:

pinMode(A0, INPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
pinMode(4, OUTPUT);
pinMode(6, OUTPUT); 
pinMode(7, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(analogRead(A0));

if (analogRead(A0)<500)
{ 
  digitalWrite(11, LOW);
  digitalWrite(12, LOW);
  digitalWrite(13, LOW);
  digitalWrite(7, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(9,LOW);
  digitalWrite(3,LOW);
}
else if (analogRead(A0)<400)
{ 
  digitalWrite(11, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(7, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(9,HIGH);
  digitalWrite(3,LOW);
}
else if (analogRead(A0)<300)
{ 
  digitalWrite(11, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(13, HIGH);
  digitalWrite(7, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(10, LOW);
  digitalWrite(2, LOW);
  digitalWrite(9,LOW);
  digitalWrite(3,LOW);
}
else 
{ 
  
  digitalWrite(11, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(13, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(10, LOW);
  digitalWrite(2, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(3,HIGH);
}
}