Simple Led strip with array issue

Other Hardware LEDs and Multiplexing
2

Run this code and you will find out why :slight_smile:

int Arry1[NUM_LEDS] = {0, 3}; // <- this is same as {0, 3, 0, 0, 0, 0} in your case.
for(int i = 0; i < NUM_LEDS; i++){
    Serial.printf(Arry1[i]); 
}

//this should work
for(int i = 0; i < 2; i++){
    Serial.printf(Arry1[i]); 
}