#include <Adafruit_NeoPixel.h>
Adafruit_NeoPixel strip = Adafruit_NeoPixel(16,2,NEO_GRB + NEO_KHZ800);
void setup() { 
  strip.begin();
}

void loop() {
  static int c=10;
  strip.Color(0,255,0);
  for(int i=0;i<16;i++){
    strip.setPixelColor(i,strip.Color(c,200,c-20));
    strip.show();
    delay(50);
    strip.setPixelColor(i,strip.Color(0,0,0));
    strip.show();
    delay(10);
  }
  strip.show();  
  c+=50;  
  delay(50); // this speeds up the simulation
}