How to set the starting point ws2812 strip

Using Arduino LEDs and Multiplexing
1

Hello everyone, I have a question whether you can set the start point for the LED strip in the NeoPixel or ws2812FX library?
I need to define the beginning of the strip in a place other than 0, so that the animations start at this point and end there. Can anyone help?

2

A statement like

    strip.setPixelColor(ledNumber, colour);

sets the LED at position ledNumber to the specified colour
ledNumber can be any LED in the strip

If you want to use a for loop then add an offset to the LED number

for (int ledNumber = 0; ledNumber < NUMBER_OF_LEDS; ledNumber++)
{
  strip.setPixelColor(ledNumber + offSet, colour);
}

or use the actual LED numbers in the for loop

for (int ledNumber = offSet; ledNumber < NUMBER_OF_LEDS; ledNumber++)
{
  strip.setPixelColor(ledNumber, colour);
}
3

I have a question whether you can set the start point for the LED strip in the NeoPixel

Only in software, like UKHeliBob said. At each step of an animation all the LEDs are updated at the same time. If you update an LED to the same numbers as it already was then you see no change but you still need to update all the LEDs.

4