int i = 0;

void setup()
{
  pinMode(A0, INPUT);
  pinMode(11, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}

void loop()
{
  if (analogRead(A0) <= 50) {
    analogWrite(11, 51);
    analogWrite(9, 51);
    analogWrite(10, 255);
  } else {
    if (analogRead(A0) >= 200) {
      analogWrite(11, 204);
      analogWrite(9, 0);
      analogWrite(10, 0);
    } else {
      if (analogRead(A0) > 50) {
        analogWrite(11, 0);
        analogWrite(9, 153);
        analogWrite(10, 0);
      }
    }
  }
  delay(10); // Delay a little bit to improve simulation performance
}