#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif
#define PIN        6 // On Trinket or Gemma, suggest changing this to 1
#define NUMPIXELS 16 // Popular NeoPixel ring size
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 200 // Time (in milliseconds) to pause between pixels

const int buttonPin_O = 8;     // 按鈕連接的pin
const int buttonPin_B = 9;     // 按鈕連接的pin
const int ledPin_O =  4;      // LED pin
const int ledPin_B =  5;      // LED pin

int buttonState_O = 0; 
int buttonState_B = 0; 

void setup() 
{
  pixels.begin();
  pixels.clear();
  pixels.show();
  pinMode(ledPin_O, OUTPUT);
  pinMode(ledPin_B, OUTPUT); 
  pinMode(buttonPin_O, INPUT);
  pinMode(buttonPin_B, INPUT);
}
void loop() 
{  
  buttonState_O = digitalRead(buttonPin_O);
  buttonState_B = digitalRead(buttonPin_B);
  if (buttonState_O == HIGH)
  {
    digitalWrite(ledPin_O, HIGH);
    pixels.clear();
    for(int i=0; i<NUMPIXELS; i++) 
   {
        pixels.setPixelColor(i, pixels.Color(255, 0, 255));
        pixels.show();
        delay(DELAYVAL);
   }
    pixels.clear();
    pixels.show();
  } 
  else 
  {
    digitalWrite(ledPin_O, LOW);
  }
  if (buttonState_B == HIGH)
   {
    digitalWrite(ledPin_B, HIGH);
    pixels.clear();
    for(int i=15; i>=0; i--) 
   {
        pixels.setPixelColor(i, pixels.Color(0, 255, 255));
        pixels.show();
        delay(DELAYVAL);
   }
    pixels.clear();
    pixels.show();
  } 
  else {
    digitalWrite(ledPin_B, LOW);
  }
}