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

#define PIN 1

Parameter 1 = number of pixels in strip
Parameter 2 = Arduino pin number (most are valid)
Parameter 3 = pixel type flags, add together as needed:
NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)
NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
NEO_RGBW Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
and minimize distance between Arduino and first pixel. Avoid connecting
on a live circuit…if you must, connect GND first.

void setup() {
This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
#if defined (AVR_ATtiny85)
if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
End of trinket special code

strip.begin();
strip.show(); Initialize all pixels to 'off'
} void loop() {
Some example procedures showing how to display to the pixels:
colorWipe(strip.Color(255, 0, 0), 50); Red
colorWipe(strip.Color(0, 255, 0), 50); Green
colorWipe(strip.Color(0, 0, 255), 50); Blue
colorWipe(strip.Color(0, 0, 0, 255), 50); White RGBW
Send a theater pixel chase in…
theaterChase(strip.Color(127, 127, 127), 50); White
theaterChase(strip.Color(127, 0, 0), 50); Red
theaterChase(strip.Color(0, 0, 127), 50); Blue rainbow(20);
rainbowCycle(20);
theaterChaseRainbow(50);
} Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {

strip.setPixelColor(i, c);\\
strip.show();\\
delay(wait);\\

}
}

void rainbow(uint8_t wait) {
uint16_t i, j;

for(j=0; j<256; j++) {

for(i=0; i<strip.numPixels(); i++) {\\
strip.setPixelColor(i, Wheel((i+j) & 255));\\
}\\
strip.show();\\
delay(wait);\\

}
}

Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
uint16_t i, j; for(j=0; j<256*5; j++) { 5 cycles of all colors on wheel

for(i=0; i<strip.numPixels(); i++) {\\
strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));\\
}\\
strip.show();\\
delay(wait);\\

}
}

Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
for (int j=0; j<10; j++) { do 10 cycles of chasing

for (int q=0; q <3; q++) {\\
for (uint16_t i=0; i <strip.numPixels(); i=i+3) {\\
strip.setPixelColor(i+q, c);    //turn every third pixel on\\
}\\
strip.show();

delay(wait);

for (uint16_t i=0; i <strip.numPixels(); i=i+3) {\\
strip.setPixelColor(i+q, 0);   //turn every third pixel off\\
}\\
}\\

}
}

Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
for (int j=0; j < 256; j++) { cycle all 256 colors in the wheel

for (int q=0; q <3; q++) {\\
for (uint16_t i=0; i <strip.numPixels(); i=i+3) {\\
strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on\\
}\\
strip.show();

delay(wait);

for (uint16_t i=0; i <strip.numPixels(); i=i+3) {\\
strip.setPixelColor(i+q, 0);   //turn every third pixel off\\
}\\
}\\

}
}

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) {
WheelPos = 255 - WheelPos;
if(WheelPos < 85) {

return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);\\

}
if(WheelPos < 170) {

WheelPos -= 85;\\
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);\\

}
WheelPos -= 170;
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}