#include <FastLED.h>

#define LED_PIN 3
#define NUM_LEDS 30
#define BRIGHTNESS 200 // Set LED brightness (0-255)
#define HUE_INCREMENT 1 // Increment for hue shift
#define DELAY_TIME 10 // Delay time in milliseconds for smooth transition

CRGB leds[NUM_LEDS];
uint8_t hue = 0; // Variable to keep track of the hue

void setup() {
  Serial.begin(9600);
  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(BRIGHTNESS);
}

void loop() {
  // Fill the entire strip with the current hue
  fill_solid(leds, NUM_LEDS, CHSV(hue, 255, 255)); // Saturation and value set to max
  
  // Update the LEDs
  FastLED.show();
  
  // Increment hue for the next loop
  hue += HUE_INCREMENT;
  
  // Add a small delay to control speed of hue cycling
  delay(DELAY_TIME);
}