// For: https://forum.arduino.cc/t/how-to-turn-on-only-one-color-in-addressable-led-using-fastled-library/1014132
// A few changes were made, but the original sketch also turned the ledstrip green.
//
// Good tutorial: https://www.tweaking4all.com/hardware/arduino/adruino-led-strip-effects/
//
// Note that the first led is on the right in this simulation.

#include <FastLED.h>

#define NUM_LEDS  200
#define LED_PIN   2

CRGB leds[NUM_LEDS];

void setup()
{
  Serial.begin(9600);
  
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(100);              // not needed for Wokwi
}

void loop()
{
  // Serial.println("Arduino for loop");

  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB::Green;              // Predefined color of FastLED library
    FastLED.show();                       // Update the new data to the ledstrip
    delay(10);
  }

  // Just green is no fun, let's add another color.
  for (int i = NUM_LEDS -1; i >= 0; i--)
  {
    leds[i] = CRGB::Orange;             // Predefined color of FastLED library
    FastLED.show();                       // Update the new data to the ledstrip
    delay(10);
  }

  // Using the fill function
  fill_solid(leds, NUM_LEDS, CRGB::Purple);
}