Arduino Potentiometer

int sensorValue;
int LEDpin2 = 2;
int LEDpin3 = 3;
int LEDpin4 = 4;
int LEDpin5 = 5;
int LEDpin6 = 6;
int LEDpin7 = 7;
int LEDpin8 = 8;
int LEDpin9 = 9;
int LEDpin10 = 10;
int LEDpin11 = 11;


void setup() {
  Serial.begin(9600);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop() {
  sensorValue = analogRead(A0);
  Serial.print("sensor = ");
  Serial.println(sensorValue);
  //------------------------
  if (sensorValue == 0) {
    digitalWrite(2, 0);
    digitalWrite(3, 0);
    digitalWrite(4, 0);
    digitalWrite(5, 0);
    digitalWrite(6, 0);
    digitalWrite(7, 0);
    digitalWrite(8, 0);
    digitalWrite(9, 0);
    digitalWrite(10, 0);
    digitalWrite(11, 0);
  }
  if (sensorValue > 0 && sensorValue <= 100) {
    digitalWrite(2, 1);
    digitalWrite(3, 0);
    digitalWrite(4, 0);
    digitalWrite(5, 0);
    digitalWrite(6, 0);
    digitalWrite(7, 0);
    digitalWrite(8, 0);
    digitalWrite(9, 0);
    digitalWrite(10, 0);
    digitalWrite(11, 0);
  }
  if (sensorValue > 100 && sensorValue <= 200) {
    digitalWrite(2, 1);
    digitalWrite(3, 1);
    digitalWrite(4, 0);
    digitalWrite(5, 0);
    digitalWrite(6, 0);
    digitalWrite(7, 0);
    digitalWrite(8, 0);
    digitalWrite(9, 0);
    digitalWrite(10, 0);
    digitalWrite(11, 0);
  }

if (sensorValue > 200 && sensorValue <= 300) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 0);
  digitalWrite(6, 0);
  digitalWrite(7, 0);
  digitalWrite(8, 0);
  digitalWrite(9, 0);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}



if (sensorValue > 300 && sensorValue <= 400) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 0);
  digitalWrite(7, 0);
  digitalWrite(8, 0);
  digitalWrite(9, 0);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}

if (sensorValue > 400 && sensorValue <= 500) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 0);
  digitalWrite(8, 0);
  digitalWrite(9, 0);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}
if (sensorValue > 500 && sensorValue <= 600) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 0);
  digitalWrite(9, 0);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}

if (sensorValue > 600 && sensorValue <= 700) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 1);
  digitalWrite(9, 0);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}

if (sensorValue > 700 && sensorValue <= 800) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 1);
  digitalWrite(9, 1);
  digitalWrite(10, 0);
  digitalWrite(11, 0);
}

if (sensorValue > 800 && sensorValue <= 900) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 1);
  digitalWrite(9, 1);
  digitalWrite(10, 1);
  digitalWrite(11, 0);
}

if (sensorValue > 900 && sensorValue <= 1000) {
  digitalWrite(2, 1);
  digitalWrite(3, 1);
  digitalWrite(4, 1);
  digitalWrite(5, 1);
  digitalWrite(6, 1);
  digitalWrite(7, 1);
  digitalWrite(8, 1);
  digitalWrite(9, 1);
  digitalWrite(10, 1);
  digitalWrite(11, 1);
}
}