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

#define PIN 6
#define NUMPIXELS 24 // Popular NeoPixel ring size

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

#define DELAYVAL 100

void setup() {
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
clock_prescale_set(clock_div_1);
#endif

pixels.begin();
}

void loop() {
	int i=0;
	bool check=0;
 		while (1) {
			if (check==0) {
			pixels.setPixelColor(i, pixels.Color(255, 0, 0));
			pixels.show();
			delay(DELAYVAL);
			i++;
			if (i==24) {
				check=1;
				i=23;
				}
			}
			if (check==1){
			pixels.setPixelColor(i, pixels.Color(0, 0, 255));
			pixels.show();
			delay(DELAYVAL);
			i--;
			if (i==-1) {
				check=0;
				i=0;
				}
			}
 		}
}