line test 2

#include "FastLED.h"
#define NUM_LEDS 60
CRGB leds[NUM_LEDS];
#define PIN 2
uint8_t gHue = 0; // rotating "base color" used by many of the patterns
#define FRAMES_PER_SECOND  120

#define BUTTON_LEAD 4
//#define BRIGHTNESS_BUTTON 19

bool buttonState = LOW;
bool lastButtonState = LOW;
int mode = 1; //Default mode is one.

void setup()
{
  pinMode(BUTTON_LEAD, INPUT_PULLUP);
  FastLED.addLeds<WS2812B, PIN, GRB>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
FastLED.show();
}

void loop() {
  if(buttonListener()) { line();}
  EVERY_N_MILLISECONDS( 10 ) { gHue++; } // slowly cycle the "base color" through the rainbow
}

void line(){
  int LineSize = 4;
  for(int i = 0; i < NUM_LEDS-LineSize-2; i++) {
  FastLED.clear();
    leds[i] += CHSV(gHue, 255, 255);
    for(int j = 1; j <= LineSize; j++) {
       leds[i+j] += CHSV(gHue, 255, 255);
    }
    leds[i+LineSize+1] += CHSV(gHue, 255, 255);
    FastLED.show();
    FastLED.delay(1000/FRAMES_PER_SECOND);
  }
  wipe();
}

void wipe(){
  for(int i=0; i<NUM_LEDS; i++){
    leds[i] = CRGB::Black;
    FastLED.show();
  }
}


/* monitor button press */
bool buttonListener() {
  bool modeChanged = false;

  buttonState = digitalRead(BUTTON_LEAD);

  if (buttonState != lastButtonState) {
    if (buttonState == LOW) {
      mode++;
      modeChanged = true;
      delay(250);             // Debounce delay. I checked the best parameter and 250 was it.
    }
  }
  lastButtonState = buttonState;

  return modeChanged;
}