#include <Adafruit_NeoPixel.h>
#define PIN 18
#define NUMPIXELS 10
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); //   NEO_KHZ800
                                                                //  NEO_KHZ400
                                                                //  NEO_GRB 
                                                                //  NEO_RGB 

void setup() {
  Serial.begin(115200);
  pixels.begin();
}
void loop() {
  pixels.clear();
  pixels.setPixelColor(0, pixels.Color(0, 150, 0));
  pixels.setPixelColor(1, pixels.Color(150, 150, 150));
  pixels.setPixelColor(2, pixels.Color(150, 0, 0));
  pixels.show();
  delay(10); // this speeds up the simulation
}