Snake WS2812B

Projects General Guidance
1

Could anyone help with making a function in which the snake gets longer? The FastLED.clear(); function clears it, and I've tried making a bool function to tell it not to clear when a food is ate, but I feel I don't have the skill level to or don't know about a function to make it add one led to the snake.

#include "FastLED.h"

#define NUM_LEDS 256

#define DATA_PIN 8

CRGB leds[NUM_LEDS];
int led = 0;
int foodLed = 0;
int dir = 0;
int trail = 1;
int pause = 200;
int szechuan(int);
int columns(int);




void setup() {
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
  randomSeed(analogRead(0));
  foodLed = food();
}


void loop() {
  leds[trail] = CRGB::Blue;
  if (led == foodLed) {
    foodLed = food();
    int morty = szechuan(led);
    FastLED.show();
    leds[morty] = CRGB::Green;
    trail++;
  }

  int valx = analogRead(1);
  int valy = analogRead(2);

  leds[szechuan(foodLed)] = CRGB::Red;


  if (valx < 354) {
    dir = 1;
  }

  if (valx > 700) {
    dir = -1;
  }

  if (valy > 700) {
    dir = 16;
  }

  if (valy < 354) {
    dir = -16;
  }


  if (abs(dir) == 1) {

    if ((led + dir) / 16 == led / 16) {
      led = led + dir;
    }

  }


  if (abs(dir) == 16) {
    if (led + dir > 0 && led + dir < 256) {
      led = led + dir;
    }

  }


  delay(pause);
  led = led % 256;

  int morty = szechuan(led);
  leds[morty] = CRGB::Green;
  int rick = leds[morty];

  FastLED.setBrightness(15);
  FastLED.show();
  FastLED.clear();


}
int szechuan(int n) {
  int output;
  if ((n / 16) % 2 == 1) {
    output = (2 * (n / 16) + 1) * 16 - 1 - n;
  }
  else {
    output = n;
  }
  return output;
}

int columns(int n) {
  int output = (16 * led) % 255;
  return output;
}


int food() {
  int x = random(256);
  return x;
}