// This is an example with the old and depreciated function "neopixelWrite()".
// See here the new version: https://wokwi.com/projects/415371249801518081
//
// No pinMode, nothing in setup(),
// just call "neopixelWrite()".
//
// Note 1: 
//    Only one led can be used with neopixelWrite(),
//    It can not be changed when the code runs.
//    As soon as the function is called, that
//    pin seems to be fixed.
//
// Note 2:
//    See this Issue: https://github.com/wokwi/wokwi-features/issues/861
//    Instead of using RGB_BUILTIN, it is better to use 38 for the
//    onboard RGB led.

int ledPin = 17;  // Use 17 (external) or 38 (onboard)

void setup() {}

void loop() 
{

  // Only one Neopixel led can be used.
  neopixelWrite(ledPin, 255,0,0);
  delay(400);
  neopixelWrite(ledPin, 0,255,0);
  delay(400);
  neopixelWrite(ledPin, 0,0,255);
  delay(400);
}