#include <FastLED.h>

#define LED_PIN     7
#define NUM_LEDS    144
#define BRIGHTNESS  100
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

uint8_t hue = 0; // Keep hue as uint8_t

void setup() {
  delay(1000); // Power-up safety delay
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(BRIGHTNESS);
}

void loop() {
  rainbow();
  // Show the LEDs
  FastLED.show();
  // Change the hue for the next loop iteration
  hue = hue + 2.5;
  // Wait a bit before moving on to the next frame
  FastLED.delay(20);
}

void rainbow() {
  // Calculate the hue delta to spread the colors across the entire strip
  uint8_t deltaHue = 256 / NUM_LEDS + 1;
  for(int i = 0; i < NUM_LEDS; i++) {
    // Apply the hue offset for each LED to create a smooth gradient
    leds[i] = CHSV(hue + (deltaHue * i), 255, 255);
  }
}