Testing NeoPixel

//import good stuff to make the neopixel work
#include <Adafruit_NeoPixel.h>
#include <avr/power.h>

//define pin for neopixel
#define PIN 6

//initialize the neopixel object (number of LEDs, pin number, color mode)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.setBrightness(3);
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  int line = 11;
  lineLoop(line);
  lineStatic(line);
  lineResize(line);
  lineStatic(line);
}

//creates a line that moves around the ring
void lineLoop(int length) {
  for (int i = 0; i < 24; i++) {
    for (int j = 0; j < length; j++) {
      int light = i + j;
      if (light > 23) {
        light -= 24;
      }
      strip.setPixelColor(light, strip.Color(255, 0, 0));
    }
    strip.show();
    delay(50);
    for (int k = 0; k < 24; k++) {
      strip.setPixelColor(k, 0);
    }
    strip.show();
  }
}

//creates a line in place
void lineStatic(int length) {
  for (int i = 0; i < length; i++) {
    strip.setPixelColor(i, strip.Color(255, 0, 0));
  }
  strip.show();
  delay(500);
}

//shrinks the line and expands it to its previous size
void lineResize(int length) {
  for (int j = 0; j < 3; j++) {
    //shrinks
    for (int i = 0; i < ((length-1)/2); i++) {
      strip.setPixelColor(i, 0);
      strip.setPixelColor(length-1-i, 0);
      strip.show();
      delay(75);
    }

    //expands
    for (int i = ((length-1)/2) - 1; i >= 0; i--) {
      strip.setPixelColor(i, strip.Color(255, 0, 0));
      strip.setPixelColor(length-1-i, strip.Color(255, 0, 0));

      strip.show();
      delay(16);
    }
  }
}