Simplistic Knight Rider (KIT) lights implementation

KnightRider.ino

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

#define PIN 6
#define LEDS 9
#define SUBSTEPS 8
#define DELAY 75

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(LEDS, PIN, NEO_RGB + NEO_KHZ800);

int position = 0;
int substep;
boolean dirRight = true;
double leds[LEDS];

void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  strip.setBrightness(128);

}

void loop() {
  leds[position] = 255;
  
  for (int j = 0; j < SUBSTEPS; j++) {
    for(int i = 0; i < strip.numPixels(); i++) {
	  leds[i] = leds[i]/1.03;
      strip.setPixelColor(i, strip.Color(leds[i]+1,0,0)); 
    }
    strip.show();
    delay(DELAY/SUBSTEPS);
  }
  
  if (dirRight) {
    position++;
  } else {
    position--;
  }
  if (position == strip.numPixels()-1 || position == 0) {
    dirRight = !dirRight;
  }
}