Arduino FastLED Drinks Coaster

FastLED_Coaster.ino

/*
 * FastLED Drinks Coaster  
 * Date: 12-2019
 * Auth: jfrmilner
 */

#include "FastLED.h"

#define DATA_PIN    2
#define LED_TYPE    WS2812
#define COLOR_ORDER GRB
#define NUM_LEDS    7
CRGB leds[NUM_LEDS];

#define FRAMES_PER_SECOND  8

void fadeall() { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(128); } }

void setup() {
  // tell FastLED about the LED strip configuration
  FastLED.addLeds<LED_TYPE,DATA_PIN,COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
}

void loop() {
  static uint8_t hue = 0;

  for(int i = 1; i < NUM_LEDS; i++) {
    fadeall();
    fadeall();
    hue = hue +30;
    leds[i] = CHSV(hue, 255, 255);
    FastLED.delay(1000/FRAMES_PER_SECOND); 
  }
  
}

Demo