#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

#define LED_PIN     8 //LED control pin (ATtiny pin 5 (PB2)
#define POT_PIN     2 //Potentiometer pin 


#define LED_COUNT  18 // How many NeoPixels are attached to the Arduino

// NeoPixel brightness, 0 (min) to 255 (max)
#define BRIGHTNESS 100
// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);


void setup() {
  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(BRIGHTNESS); // Set BRIGHTNESS (max = 255)
  pinMode (POT_PIN, INPUT);
}

void loop() {
  int brightn, pot_read;  //int two variables for reading from the potentiometer and setting LED brightness
  pot_read = analogRead(POT_PIN); //reading from the potentiometer
  brightn = map(pot_read, 0, 1023, 0, 255); //maping potentiomete value from 0-1023 to 0-255 and reversing it so the max will be on the right

  //fill with white light if 'brightn' > 5

  if (brightn > 5) {
  colorWipe(strip.Color(0, 0, 0, brightn), 0); // True white (not RGB white)
  delay (100);
  }
  else {
 colorWipe(strip.Color(0, 0, 0, 0), 0); // True white (not RGB white)   
    }
}




// Fill strip pixels one after another with a color. Strip is NOT cleared
// first; anything there will be covered pixel by pixel. Pass in color
// (as a single 'packed' 32-bit value, which you can get by calling
// strip.Color(red, green, blue) as shown in the loop() function above),
// and a delay time (in milliseconds) between pixels.
void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
    strip.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    strip.show();                          //  Update strip to match
    delay(wait);                           //  Pause for a moment
  }
}