#include <FastLED_NeoPixel.h>

#define NUM_LEDS 9  // Number of LEDs
#define DATA_PIN 2 
#define NUM_BUTTONS 9 // Number of buttons
// LED brightness, 0 (min) to 255 (max)
#define BRIGHTNESS 200

// define some basic colors to be used:
#define RED_COLOR    255, 0,    0
#define GREEN_COLOR  0,   255,  0
#define BLUE_COLOR   0,   0,  255

#define BLINK_TIME 1000 // delay time


FastLED_NeoPixel<NUM_LEDS, DATA_PIN, NEO_GRB> strip;   // create a "strip" object 
int button_list[NUM_BUTTONS] = {11, 12, 13, 14, 15, 16, 17, 18, 19};  // list of the buttons
int button_index = 0; // this is the order number of the button, start from 0. 
// Example: button_index = 0 means the first button in the list (pin 11)
//          button_index = 7 means the 8th button in the list (pin 18)

int led_index = 0; // this is the order number of the LED, start from 0. Similar to button_index

void setup() {
	strip.begin();  // initialize strip (required!)
  strip.setBrightness(BRIGHTNESS); //
  for (button_index = 0; button_index < NUM_BUTTONS; button_index++)
  {
    pinMode(button_list[button_index], INPUT_PULLUP); // set the button at 'button_index' in 'button_list' to be INPUT_PULLUP
  }
  Serial1.begin(112500);
}
bool data;
void loop() {
  for(button_index = 0; button_index < NUM_LEDS; button_index++){
    data = digitalRead(button_list[button_index]);
    if (data == LOW){
      strip.setPixelColor(button_index, strip.Color(GREEN_COLOR));  // set pixel (single LED) at button_index to GREEN
      strip.show(); //  show the color
      delay(BLINK_TIME);

      strip.setPixelColor(button_index, strip.Color(0, 0, 0));  // set pixel to BLANK (no color)
      strip.show(); //  show the color
      delay(BLINK_TIME);
    }
  }
  delay(1);
}