#include <FastLED.h>
#define NUM_LEDS 18
#define LED_PIN 2
int delay_time = 100;
CRGB leds[NUM_LEDS];
void setup() {
FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
FastLED.setBrightness(100);
}
void loop() {
for (int i = 0; i < NUM_LEDS; i++) {
leds[i] = CRGB::Red;
FastLED.show();
delay(delay_time);
}
for (int i = 0; i < NUM_LEDS; i++) {
leds[i] = CRGB::Yellow;
FastLED.show();
delay(delay_time * 0.4);
leds[i] = CRGB::Black;
FastLED.show();
delay(delay_time * 0.2);
}
}