#include <Adafruit_NeoPixel.h>

#define PIN        1 
#define NUMPIXELS  8

Adafruit_NeoPixel strip(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.setBrightness(150); 
  strip.show();           
}

void loop() {
  colorWipe(strip.Color(255,   0,  0), 50); 
  colorWipe(strip.Color(255,  40,  0), 50);
  colorWipe(strip.Color(255,  80,  0), 50); 
  colorWipe(strip.Color(255, 130,  0), 50);
}

void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, color);
    strip.show();
    delay(wait);
  }
}