Arduino eindopdracht

/*
  Button

 Turns on and off a light emitting diode(LED) connected to digital
 pin 13, when pressing a pushbutton attached to pin 2.


 The circuit:
 * LED attached from pin 13 to ground
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground

 * Note: on most Arduinos there is already an LED on the board
 attached to pin 13.


 created 2005
 by DojoDave <http://www.0j0.org>
 modified 30 Aug 2011
 by Tom Igoe

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/Button
 */

// constants won't change. They're used here to
// set pin numbers:
const int button1Pin = 2;     // the number of the pushbutton pin
const int button2Pin = 3;
const int led1Pin =  9;      // the number of the LED pin
const int led2Pin = 10;
const int led3Pin = 11;
const int led4Pin = 12;
const int led5Pin = 13;
const int motorPin = 6;
// variables will change:
int button1State = 0;         // variable for reading the pushbutton status
int button2State = 0;

void setup() {
  // initialize the LED pin as an output:
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(led3Pin, OUTPUT);
  pinMode(led4Pin, OUTPUT);
  pinMode(led5Pin, OUTPUT);

  // initialize the motor as an output:
  pinMode(motorPin, OUTPUT);
  
  // initialize the pushbutton pin as an input:
  pinMode(button1Pin, INPUT);
  pinMode(button2Pin, INPUT);
}

int i = 0;

void loop() {
  // read the state of the pushbutton value:
  button1State = digitalRead(button1Pin);
  button2State = digitalRead(button2Pin);
  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (button1State == HIGH) {
    if (i < 4) {
      i++;
    } else {
      i = 0;
    }     
    delay(200);
  }
  if (button2State == HIGH) {
    if (i == 0) {
      i = 4;
    } else {
      i = i - 1;
    }
    delay(200);
  }
 
  analogWrite(motorPin, i * 63);
  
  if (i == 0){
    digitalWrite(led1Pin, HIGH);
  } else {
    digitalWrite(led1Pin, LOW);
  }
  
  if (i == 1){
    digitalWrite(led2Pin, HIGH);
  } else {
    digitalWrite(led2Pin, LOW);
  }
  
  if (i == 2){
    digitalWrite(led3Pin, HIGH);
  } else {
    digitalWrite(led3Pin, LOW);
  }
  if (i == 3){
    digitalWrite(led4Pin, HIGH);
  } else {
    digitalWrite(led4Pin, LOW);
  }
  if (i == 4){
    digitalWrite(led5Pin, HIGH);
  } else {
    digitalWrite(led5Pin, LOW);
  }
}