#include "Arduino.h"
#include <FastLED.h>
#include <Adafruit_NeoPixel.h>
#define LED_PIN 5 //LED Strip Signal Connection 
#define buttonPin 6 //Push Button Pin

#ifdef __AVR__
  #include <avr/power.h>
#endif

#define EL 16
#define PIN 7

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(EL, PIN, NEO_GRB + NEO_KHZ800);

#define NUM_LEDS 8  //Total no of LEDs in the LED strip.

CRGB leds[NUM_LEDS];

int LED_POWER_7 = 255;
int LED_POWER_6 = 255;
int LED_POWER_5 = 150;
int LED_POWER_4 = 100;
int LED_POWER_3 = 50;
int LED_POWER_2 = 20;
int LED_POWER_1 = 5;
int LED_POWER_0 = 0;

int SPEED1 = 75;
int SPEED2 = 30;
int SPEED3 = 400;
int SPEED4 = 60;
int SPEED5 = 300;

int numb=1;
int pres=0;

void setup() 
{
FastLED.addLeds<WS2811, LED_PIN, RGB>(leds, NUM_LEDS);
FastLED.clear();
pinMode(buttonPin, INPUT_PULLUP);

pixels.begin();

  for (int i = 0; i < EL; i++){
    pixels.setPixelColor(i, pixels.Color(0,0,0));  
  }
  pixels.show();
  delay(1000);
}

int c = 0;

void loop() 
{

for (int i = 0; i < EL; i++) {
    int r = (c % EL);
    if (i == r) {
      pixels.setPixelColor(i, pixels.Color(0,0,255));  //Impostazione colore R, G, B da 0 a 255
    } else {
      pixels.setPixelColor(i, pixels.Color(0,0,0));    
    }    
  }
  pixels.show();
  delay(100); //Velocità di rotazione
  c++;
  
ButtonScan();

switch (numb) {
  
  case 1:
    Pattern1();
    break;
  case 2:
    Pattern2();
    break;
  case 3:
    Pattern3();
    break;
  case 4:
    Pattern4();
    break;
  case 5:
    Pattern5();
    break;
  case 6:
    Pattern6();
    break;
  case 7:
    Pattern7();
    break;
  case 8:
    Pattern8();
    break;
  default:
    Pattern1();
    break;
}
}

void Pattern1()
{
fadeToBlackBy(leds, NUM_LEDS, 8);
int pos = beatsin16(25, 0, NUM_LEDS-1 );
leds[pos] += CRGB(255, 0, 0);
FastLED.show();  
FastLED.delay(5); 
}

void Pattern2()
{
fadeToBlackBy(leds, NUM_LEDS, 8);
int pos = beatsin16(25, 0, NUM_LEDS-1 );
leds[pos] += CRGB(0, 255, 0);
FastLED.show();  
FastLED.delay(5); 
}

void Pattern3()
{
fadeToBlackBy(leds, NUM_LEDS, 8);
int pos = beatsin16(25, 0, NUM_LEDS-1 );
leds[pos] += CRGB(0, 0, 255);
FastLED.show();  
FastLED.delay(5); 
}

void Pattern4()
{
fadeToBlackBy(leds, NUM_LEDS, 8);
int pos = beatsin16(25, 0, NUM_LEDS-1);
leds[pos] += CRGB(255, 255, 255);
FastLED.show();  
FastLED.delay(5); 
}

void Pattern5()
{
for (int i = 0; i < 3; i++)
{
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(255, 0, 0);
  }
    FastLED.show(); ButtonScan();
  
delay (SPEED4);
  
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 0, 0);
  }
    FastLED.show(); ButtonScan();

delay (SPEED4);
}
delay (SPEED5);
}

void Pattern6()
{
for (int i = 0; i < 3; i++)
{
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 255, 0);
  }
    FastLED.show(); ButtonScan();
  
delay (SPEED4);
  
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 0, 0);
  }
    FastLED.show(); ButtonScan();

delay (SPEED4);
}
delay (SPEED5);
}

void Pattern7()
{
for (int i = 0; i < 3; i++)
{
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 0, 255);
  }
    FastLED.show(); ButtonScan();
  
delay (SPEED4);
  
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 0, 0);
  }
    FastLED.show(); ButtonScan();

delay (SPEED4);
}
delay (SPEED5);
}

void Pattern8()
{
for (int i = 0; i < 3; i++)
{
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(255, 255, 255);
  }
    FastLED.show(); ButtonScan();
  
delay (SPEED4);
  
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB(0, 0, 0);
  }
    FastLED.show(); ButtonScan();

delay (SPEED4);
}
delay (SPEED5);
}




void ButtonScan()
{
if(digitalRead(buttonPin)==0)
   {
    if(pres==0)
   {
    numb++;
    pres=1;
   }
    }
  else
  {
    pres=0;
   }  

 if(numb == 14)
 {
 numb = 1;
 }
}