servo with potentiometer and 3 LED

#include <Servo.h>

Servo myservo; //create servo object to control a servo

const int potpin = A0; //analog pin used to connect the potentiometer
int value; //variable to read the value from the analog pin
const int whiteled = 5;
const int yellowled = 4;
const int blueled = 3;

void setup()
{
  pinMode (potpin, INPUT);
  Serial.begin (9600);
  myservo.attach(12);//attaches the servo on pin 12 to the servo object
  pinMode (whiteled, OUTPUT);
  pinMode (yellowled, OUTPUT);
  pinMode (blueled, OUTPUT);
}

void loop()
{
  value = analogRead (potpin);
  value = map(value, 0, 1023, 0, 180);
  Serial.println (value);
  myservo.write (value); //write into servo the value of the potentiometer, makes servo move
  delay (15);
  if (value < 90)
    {
     digitalWrite (whiteled, HIGH);
     digitalWrite (yellowled, LOW);
     digitalWrite (blueled, LOW);
    }

  else if (value == 90)
    {
    digitalWrite (whiteled, LOW);
    digitalWrite (yellowled, HIGH);
    digitalWrite (blueled, LOW);
    }
  else if (value > 90)
    {
    digitalWrite (whiteled, LOW);
    digitalWrite (yellowled, LOW);
    digitalWrite (blueled, HIGH);
     }
}