#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

// strip connected to pin 6
#define PIN 6

// defining strip as instance of neopixel library
Adafruit_NeoPixel strip = Adafruit_NeoPixel(5, 6, NEO_GRB + NEO_KHZ800); // number of pixels, pin number

// button 1 connected to pin 7
const int button1 = 7;

// button 2 connected to pin 8
const int button2 = 8;

// both button states starts at 0 (off)
int button1State = 0;
int button2State = 0;

void setup() {
  // initialize strip
  strip.begin();

  // sets pixels to 0 (off)
  strip.show();

  // sets buttons as input
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
}

void loop() {
  // reads button state
  button1State = digitalRead(button1);
  button2State = digitalRead(button2);

  if((button1State == HIGH) && (button2State == LOW)){ // if button 1 is on (and button 2 is off)
    for(uint16_t i = 0; i < strip.numPixels(); i++){
      strip.setPixelColor(i, 255, 0, 0); // sets LED colors to red
      strip.show(); // shows pixel color
      delay(100); //delay of showing
    }
  }

  else if((button2State == HIGH) && (button1State == LOW)){ // if button 2 is on (and button 1 is off)
    for(uint16_t i = 0; i < strip.numPixels(); i++){
      strip.setPixelColor(i, 0, 0, 255); // sets LED colors to blue
      strip.show();
      delay(100);
    }
  }

  else if((button1State == HIGH) && (button2State == HIGH)){
    for(uint16_t i = 0; i < strip.numPixels(); i++){
      strip.setPixelColor(i, 180, 0, 180); // sets LED colors to purple
      strip.show();
      delay(100);
    }
  }

  else if((button1State == LOW) && (button2State == LOW)){ // if button 1 is off and button 2 is off
    for(uint16_t i = 0; i < strip.numPixels(); i++){
      strip.setPixelColor(i, 0, 0, 0); // sets LEDs to off
      strip.show();
      delay(100);
    }
  }

}