WS2812B Fastled Theater chase

Other Hardware LEDs and Multiplexing
6

Hi BbkHawk

Here is the code I suggest : it compiles OK but I didn't try it.

#include <FastLED.h>

// Define the array of leds
#define LED_DT 6
#define COLOR_ORDER GRB
#define LED_TYPE WS2812
#define NUM_LEDS 150
uint8_t max_bright = 255;
struct CRGB leds[NUM_LEDS];

int index1;
int index2;
unsigned long initialtime;

void set4leds(int pos) {
  leds[pos].setRGB (0, 0, 0);
  leds[pos + 1].setRGB (0, 0, 0);
  leds[pos + 2].setRGB (0, 0, 0);
  leds[pos + 3].setRGB (0, 0, 0);
}

void setup() {
  delay (1000);
  LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS);
  FastLED.setBrightness(max_bright);
  index1 = 0;
  index2 = 0;
  initialtime = millis();
}

void loop() {
  FastLED.clear();
  set4leds(index1);
  index1 = (index1 + 1) % (NUM_LEDS - 4);
  if (millis() - initialtime > 1000) {
    set4leds(index2);
    index2 = (index2 + 1) % (NUM_LEDS - 4);
  }
  FastLED.show();
  delay (50);
}

However, it's definitely not the same as the example from the website you cited. This should send 4 lit LEDs in the strip, followed by another group of 4 one second later.