tv code

const int BUTTON_PIN = 7;
const int LED_PIN    = 3;
#include <FastLED.h>
#define num_leds 16
#define pin 6

CRGB leds[num_leds];

int ledState = LOW;
int lastButtonState;
int currentButtonState;

void setup() {
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  FastLED.addLeds<WS2812B, pin, GRB>(leds, num_leds);
  FastLED.setBrightness(0);

  currentButtonState = digitalRead(BUTTON_PIN);
}

void loop() {
  lastButtonState    = currentButtonState;
  currentButtonState = digitalRead(BUTTON_PIN);

  if(lastButtonState == HIGH && currentButtonState == LOW) {
    Serial.print("The button is pressed: ");

    if(ledState == LOW) {
       ledState = HIGH;
       Serial.println("Turning LED on");
       leds[(16)] = CRGB(255, 0, 0);    //this is where i lose confidence in what I have done
       FastLED.setBrightness(100);
    }
    else {
      ledState = LOW;
      Serial.println("Turning LED off");
      leds[(50)] = CRGB(0, 0, 0);
      FastLED.setBrightness(0);
    }
    digitalWrite(LED_PIN, ledState);
  }
}