SketchArduino.ino

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

#define NUM_LEDS 32
#define PIN 6
#define BRIGHTNESS 20
#define BUTTON_PREVIOUS 13
#define BUTTON_NEXT 12

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

bool oldStatePrevious = HIGH;
bool oldStateNext = HIGH;
int showType = 0;

void setup() {
  pinMode(BUTTON_PREVIOUS, INPUT_PULLUP);
  pinMode(BUTTON_NEXT, INPUT_PULLUP);
  strip.setBrightness(BRIGHTNESS);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {

  // Get current button state.
  bool newStatePrevious = digitalRead(BUTTON_PREVIOUS);
  bool newStateNext = digitalRead(BUTTON_NEXT);

  // Check if state changed from high to low (button press).
  if (newStateNext == LOW && oldStateNext == HIGH) {
    // Short delay to debounce button.
    delay(20);
    // Check if button is still low after debounce.
    newStateNext = digitalRead(BUTTON_NEXT);
    if (newStateNext == LOW) {
      showType++;
      if (showType > 2)
        showType=0;
      startShow(showType);
    }
  }
  
  // Check if state changed from high to low (button press).
  if (newStatePrevious == LOW && oldStatePrevious == HIGH) {
    // Short delay to debounce button.
    delay(20);
    // Check if button is still low after debounce.
    newStatePrevious = digitalRead(BUTTON_PREVIOUS);
    if (newStatePrevious == LOW) {
      showType--;
      if (showType < 0)
        showType=3;
      startShow(showType);
    }
  }

  // Set the last button state to the old state.
  oldStateNext = newStateNext;
  oldStatePrevious = newStatePrevious;
}

void startShow(int i) {
  switch(i){
    case 0: rainbowStrip();
            break;
    case 1: middleFill(strip.Color(0, 255, 0), 100);
            break;
    case 2: sideFill(strip.Color(255, 0, 0), 100);
            break;
  }
}
void rainbowStrip() {
  
  int i = 0;
  while(i<NUM_LEDS*4) {     
    strip.setPixelColor(i%NUM_LEDS, strip.Color(255, 255, 255)); //change RGB color value here
    strip.setPixelColor((i+1)%NUM_LEDS, strip.Color(255, 5, 180)); //change RGB color value here
    strip.setPixelColor((i+2)%NUM_LEDS, strip.Color(255, 0, 0)); //change RGB color value here
    strip.setPixelColor((i+3)%NUM_LEDS, strip.Color(255, 150, 0)); //change RGB color value here
    strip.setPixelColor((i+4)%NUM_LEDS, strip.Color(255, 255, 5)); //change RGB color value here
    strip.setPixelColor((i+5)%NUM_LEDS, strip.Color(0, 255, 0)); //change RGB color value here
    strip.setPixelColor((i+6)%NUM_LEDS, strip.Color(0, 0, 255)); //change RGB color value here
    strip.setPixelColor((i+7)%NUM_LEDS, strip.Color(135, 10, 215)); //change RGB color value here
    strip.setPixelColor((i+8)%NUM_LEDS, strip.Color(255, 255, 255)); //change RGB color value here
    strip.setPixelColor((i+9)%NUM_LEDS, strip.Color(255, 5, 180)); //change RGB color value here
    strip.setPixelColor((i+10)%NUM_LEDS, strip.Color(255, 0, 0)); //change RGB color value here
    strip.setPixelColor((i+11)%NUM_LEDS, strip.Color(255, 150, 0)); //change RGB color value here
    strip.setPixelColor((i+12)%NUM_LEDS, strip.Color(255, 255, 5)); //change RGB color value here
    strip.setPixelColor((i+13)%NUM_LEDS, strip.Color(0, 255, 0)); //change RGB color value here
    strip.setPixelColor((i+14)%NUM_LEDS, strip.Color(0, 0, 255)); //change RGB color value here
    strip.setPixelColor((i+15)%NUM_LEDS, strip.Color(135, 10, 215)); //change RGB color value here
    strip.setPixelColor((i+16)%NUM_LEDS, strip.Color(255, 255, 255)); //change RGB color value here
    strip.setPixelColor((i+17)%NUM_LEDS, strip.Color(255, 5, 180)); //change RGB color value here
    strip.setPixelColor((i+18)%NUM_LEDS, strip.Color(255, 0, 0)); //change RGB color value here
    strip.setPixelColor((i+19)%NUM_LEDS, strip.Color(255, 150, 0)); //change RGB color value here
    strip.setPixelColor((i+20)%NUM_LEDS, strip.Color(255, 255, 5)); //change RGB color value here
    strip.setPixelColor((i+21)%NUM_LEDS, strip.Color(0, 255, 0)); //change RGB color value here
    strip.setPixelColor((i+22)%NUM_LEDS, strip.Color(0, 0, 255)); //change RGB color value here
    strip.setPixelColor((i+23)%NUM_LEDS, strip.Color(135, 10, 215)); //change RGB color value here
    strip.setPixelColor((i+24)%NUM_LEDS, strip.Color(255, 255, 255)); //change RGB color value here
    strip.setPixelColor((i+25)%NUM_LEDS, strip.Color(255, 5, 180)); //change RGB color value here
    strip.setPixelColor((i+26)%NUM_LEDS, strip.Color(255, 0, 0)); //change RGB color value here
    strip.setPixelColor((i+27)%NUM_LEDS, strip.Color(255, 150, 0)); //change RGB color value here
    strip.setPixelColor((i+28)%NUM_LEDS, strip.Color(255, 255, 5)); //change RGB color value here
    strip.setPixelColor((i+29)%NUM_LEDS, strip.Color(0, 255, 0)); //change RGB color value here
    strip.setPixelColor((i+30)%NUM_LEDS, strip.Color(0, 0, 255)); //change RGB color value here
    strip.setPixelColor((i+31)%NUM_LEDS, strip.Color(135, 10, 215)); //change RGB color value here
    i++;
    strip.show();
    delay(75);
  }
}
// Light up the strip starting from the middle
void middleFill(uint32_t c, uint8_t wait) {
  clearStrip();
  delay(wait);

  for(uint16_t i=0; i<(strip.numPixels()/2); i++) { // start from the middle, lighting an LED on each side
    strip.setPixelColor(strip.numPixels()/2 + i, c);
    strip.setPixelColor(strip.numPixels()/2 - i, c);
    strip.show();
    delay(wait);
  }
  strip.setPixelColor(0, c);
  strip.show();
  delay(wait);

  for(uint16_t i=0; i<(strip.numPixels()/2); i++) { // reverse
    strip.setPixelColor(i, strip.Color(0, 0, 0));
    strip.setPixelColor(strip.numPixels() - i, strip.Color(0, 0, 0));
    strip.show();
    delay(wait);
  }
  clearStrip();
}