#include <Adafruit_NeoPixel.h>
#define PIN 6
#define NUMPIXELS 20
Adafruit_NeoPixel strip= Adafruit_NeoPixel(NUMPIXELS,PIN,NEO_GRB + NEO_KHZ800);

void setup() {
strip.begin();
strip.show();
  // put your setup code here, to run once:

}

void loop() {
colorWipe(strip.Color(255,0,0),50);
colorWipe(strip.Color(0,255,0),50);
colorWipe(strip.Color(0,0,255),50);
colorWipe(strip.Color(255,255,0),50);// put your main code here, to run repeatedly:
}
void colorWipe(uint32_t color,int wait){
  for (int i=0;i<strip.numPixels();i++){
    strip.setPixelColor(i,color);
    strip.show();
    delay(wait);
  }
}