const int correct_rgb_pin = 38;
void setup() {
Serial.begin(115200);
Serial.print("Neopixel-GPIO is ");
Serial.println(correct_rgb_pin);
}
void loop() {
neopixelWrite(correct_rgb_pin, 255,0,0);
delay(500);
neopixelWrite(correct_rgb_pin, 0,255,0);
delay(500);
neopixelWrite(correct_rgb_pin, 0,0,255);
delay(500);
}