jack-box.ino

#include <Adafruit_NeoPixel.h>

static Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, 3, NEO_GRB + NEO_KHZ800);

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos, byte bright) {
  if (WheelPos < 85) {
    WheelPos *= 3;
    return strip.Color(WheelPos * bright / 256, (255 - WheelPos) * bright / 256, 0);
  }
  else if (WheelPos < 170) {
    WheelPos -= 85;
    WheelPos *= 3;
    return strip.Color((255 - WheelPos) * bright / 256, 0, WheelPos * bright / 256);
  }
  else {
    WheelPos -= 170;
    WheelPos *= 3;
    return strip.Color(0, WheelPos * bright / 256, (255 - WheelPos) * bright / 256);
  }
}

void setup() {
  pinMode(0, INPUT);
  pinMode(1, INPUT);
  pinMode(2, INPUT);
  pinMode(3, OUTPUT);
  strip.show();

}

int mode = 0;
int speed = 1;
int bright = 1;
int color = 0;
int alt = 0;

int altm = 0;
int altc = 0;
int alt1 = 0;
int alt2 = 100;

int A = 0;
int B = 0;
int C = 0;

void loop() {
  int a = 0, b = 0, c = 0;
  int down = digitalRead(1);
  if (down != A) {
    A = down;
    if (down) a = 1;
  }
  down = digitalRead(2);
  if (down != C) {
    C = down;
    if (down) c = 1;
  }
  down = digitalRead(0);
  if (down != B) {
    B = down;
    if (down) b = 1;
  }
 
  if (a) mode = (mode + 1) % 4;

  switch (mode) {
    case 0: // Rainbow
      color = (color + 1) % 256;
      strip.setPixelColor(0, Wheel(color, bright * 80 + 15));
      strip.show();
      if (b) speed = (speed + 1) % 4;
      if (c) bright = (bright + 1) % 4;
      delay(speed == 0 ? 100 :
            speed == 1 ?  40 :
            speed == 2 ?  10 :
                           1);
      break;
    case 1: // Solid
      if (down) color = (color + 1) % 256;
      if (c) bright = (bright + 1) % 4;
      strip.setPixelColor(0, Wheel(color, bright * 80 + 15));
      strip.show();
      delay(50);
      break;
    case 2: // Crazy
      strip.setPixelColor(0, Wheel(random(0, 256), random(100, 256)));
      strip.show();
      delay(random(0, 400));
      break;
    case 3: // Alternate
      if (c) altm = (altm + 1) % 3;
      switch (altm) {
        case (0):
          strip.setPixelColor(0, Wheel(altc ? alt1 : alt2, 100));
          strip.show();
          altc = !altc;
          delay(500);
          break;
        case (1):
          if (down) alt1 = (alt1 + 1) % 256;
          strip.setPixelColor(0, Wheel(alt1, 100));
          strip.show();
          delay(50);
          break;
        case (2):
          if (down) alt2 = (alt2 + 1) % 256;
          strip.setPixelColor(0, Wheel(alt2, 100));
          strip.show();
          delay(50);
          break;
      }
      break;
  }
  if (a || b || c) delay(100);
}