#include <Adafruit_NeoPixel.h>

#define LED_PIN     6
#define LED_COUNT   16

#define BUTTON_PIN  2

Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

int buttonState = 0;
int lastButtonState = 0;

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

  pinMode(BUTTON_PIN, INPUT);
}

void loop() {
  buttonState = digitalRead(BUTTON_PIN);

  // Check if button is pressed
  if (buttonState == HIGH && lastButtonState == LOW) {
    // Run LED sequence
    colorWipe(strip.Color(255, 0, 0), 50); // Red
    colorWipe(strip.Color(0, 255, 0), 50); // Green
    colorWipe(strip.Color(0, 0, 255), 50); // Blue
  }

  lastButtonState = buttonState;
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, color);
    strip.show();
    delay(wait);
  }
}