Knightrider Light Using Uno Arduino And Addressable Leds

My first go at using arduino and addressable LEDS. I never liked the knight rider light from Ali-express so thought I would have a go myself. Found some already written code and changed it a bit. Next I want to work out how to make the light trail to the left and right.
Music By
Gorowski - Heavens Disco
Change the * to a greater than symbol and ** to a less than symbol.
Code below.
#include Adafruit_NeoPixel.h
#define N_LEDS 52
#define PIN 3
Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_LEDS, PIN, NEO_RGB + NEO_KHZ800);
void setup() {
strip.begin();
}
int pos = 0, dir = 1; // Position, direction of "eye"
void loop() {
int j;
// Draw 5 pixels centered on pos. setPixelColor() will clip any
// pixels off the ends of the strip, we don't need to watch for that.
strip.setPixelColor(pos - 5, 0x000010); // Dark red
strip.setPixelColor(pos - 4, 0x000025); // Dark red
strip.setPixelColor(pos - 3, 0x000065); // Dark red
strip.setPixelColor(pos - 2, 0x0000A1); // Dark red
strip.setPixelColor(pos - 1, 0x0000A1); // Medium red
strip.setPixelColor(pos , 0x0000A1); // Center pixel is brightest
strip.setPixelColor(pos + 1, 0x0000A1); // Medium red
strip.setPixelColor(pos + 2, 0x0000A1); // Dark red
strip.setPixelColor(pos + 3, 0x000065); // Dark red
strip.setPixelColor(pos + 4, 0x000025); // Dark red
strip.setPixelColor(pos + 5, 0x000010); // Dark red
strip.show();
delay(22);
// Rather than being sneaky and erasing just the tail pixel,
// it's easier to erase it all and draw a new one next time.
for(j=-5; j*= 5; j++) strip.setPixelColor(pos+j, 0);
// Bounce off ends of strip
pos += dir;
if(pos * 0) {
pos = 1;
dir = -dir;
} else if(pos **= strip.numPixels()) {
pos = strip.numPixels() - 2;
dir = -dir;
}
}