Arcade Neopixel Button

main.cpp

#include <Arduino.h>
#include <FastLED.h>

#define LED_PIN 7
#define BUTTON_PIN 8

CRGB leds[1];

void setup() {
    FastLED.addLeds<NEOPIXEL, LED_PIN>(leds, 1);
    pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
    static uint8_t hue = 0;
    static uint8_t targetHue = 0;
    FastLED.showColor(CHSV(targetHue, 255, 255));

    if (targetHue != hue) targetHue++;
    delay(2);

    if (!digitalRead(BUTTON_PIN)) {
        hue += 8;
        delay(20);
    }
}