rainbow-goggles.ino

#include <Adafruit_NeoPixel.h>
#ifdef __AVR_ATtiny85__ // Trinket, Gemma, etc.
 #include <avr/power.h>
#endif
 
#define PIN 1
 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(32, PIN);
 
uint8_t offset = 0;
                      // red, orange, yellow, green, blue, indigo, violet, pink
uint32_t colors[8] = {0xFF0000, 0xFF6600, 0xFFFF00, 0x00FF00, 0x0000FF, 0x4B0082, 0xEE82EE, 0xFFCCCC}; 
uint32_t prevTime;
 
void setup() {
#ifdef __AVR_ATtiny85__ // Trinket, Gemma, etc.
  if(F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
  pixels.begin();
  pixels.setBrightness(85); // 1/3 brightness
  prevTime = millis();
}
 
void loop() {
  uint8_t  i;
  uint32_t t;
  
  for(i=0; i<16; i++) {
    uint32_t c = colors[(i+offset)%8];
    pixels.setPixelColor(   i, c); // First eye
    pixels.setPixelColor(31-i, c); // Second eye (flipped)
  }
  
  pixels.show();
  offset++;
  delay(50);
}