led.brightness. (function 5)

#include "FastLED.h"

// How many leds in your strip?
#define NUM_LEDS 15

// For led chips like Neopixels, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806, define both DATA_PIN and CLOCK_PIN
#define DATA_PIN 5
#define CLOCK_PIN 6

// Define the array of leds
CRGB leds[NUM_LEDS];

unsigned long bounces;
unsigned int timeDelay = 300;

void setup() {
  Serial.begin(57600);
  Serial.println("resetting");

  // Change depending on the LED strip model
  LEDS.addLeds<DOTSTAR, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
  LEDS.setBrightness(84);
}

void loop() {
  static uint8_t hue = 0;
  Serial.print("x");

  // every 4 bounces or 2 loops
  if (bounces%2 == 0) {
    // now supports 4.25 colors!
    hue = hue + 60;
  }

  // First slide the led in one direction
  for(int i = 0; i < NUM_LEDS; i++) {
     // if it passes half way
     if (i+4 == NUM_LEDS/2) {
      // now supports 4.25 colors!
      hue = hue + 60;
     }

    leds[i] = CHSV(hue, 255, (255/5)*1);
    leds[i+1] = CHSV(hue, 255, (255/5)*2);
    leds[i+2] = CHSV(hue, 255, (255/5)*3);
    leds[i+3] = CHSV(hue, 255, (255/5)*4);
    leds[i+4] = CHSV(hue, 255, 255);

    hue++;
    // Show the leds
    FastLED.show();
    // go Back to Black
    leds[i] = CRGB::Black;

    delay(timeDelay);
  }

//  // then slide the LED into the other direction
  for(int i = (NUM_LEDS)-1; i >= 0; i--) {
    // // if it passes half way
    // if (i == NUM_LEDS/2) {
    //  // now supports 4.25 colors!
    //  hue = hue + 60;
    // }

    leds[i] = CHSV(hue, 255, 255);
    leds[i+1] = CHSV(hue, 255, (255/5)*4);
    leds[i+2] = CHSV(hue, 255, (255/5)*3);
    leds[i+3] = CHSV(hue, 255, (255/5)*2);
    leds[i+4] = CHSV(hue, 255, (255/5)*1);

    hue++;
    // Show the leds
    FastLED.show();
    // go Back to Black
    leds[i+4] = CRGB::Black;

    delay(timeDelay);
  }

  // count as a bounce
  bounces ++;
}