Servo LED

#include <Servo.h>

Servo myservo; //create servo objet to control a servo
const int potpin=A0; //0 assumes A0, analog pin used to ocnnect the potentiometer
int potval; //variable to read the value from the analog pin
const int WritePinYellow=13;
const int WritePinGreen=12;
const int WritePinBlue=11;

void setup()
{
  pinMode (potpin, INPUT);
  pinMode (WritePinYellow,OUTPUT);
  pinMode (WritePinGreen,OUTPUT);
  pinMode (WritePinBlue,OUTPUT);
  Serial.begin (9600);
  myservo.attach(9); // attaches the servo on pin 9 to the servo object- myservo is the name of the object
  //the . means i will use a function from another thing- which is attach, and 9 represents the pin for your servo

}

void loop()
{
  //we already declared, we did all that, we did the set up, thats done- whats next in logic?
  //first thing you do is YOU NEED TO READ- (begin done in the set up, read in the loop)
  //then loop starts. it goes val=analogRead(potpin);
  //val has been declared to value read- you want to read the value to check if its working (and it is working)
  potval=analogRead(potpin); //reads the value of the potentiometer
  Serial.println(potval);
  potval=map(potval, 0, 1023,  0, 180); //scale it to use it within the servo
  myservo.write(potval); //this sets the servo position according to code
  delay(15); //waits for the servo to get there
  if (potval<=89)
  {
    digitalWrite (WritePinYellow,HIGH);
    digitalWrite (WritePinGreen,LOW);
    digitalWrite (WritePinBlue,LOW);
  }
  if (potval==90)
  {
    digitalWrite (WritePinGreen,HIGH);
    digitalWrite (WritePinYellow,LOW);
    digitalWrite (WritePinBlue,LOW);
  }
  if (potval>=180)
  {
    digitalWrite (WritePinBlue,HIGH);
    digitalWrite (WritePinYellow,LOW);
    digitalWrite (WritePinGreen,LOW);
  }


}