Help with addressable LED sketch

Can some one please Help with addressable LED sketch I need?
I have tried your sketch and only the first 9 out of 16 led's light up.
I would like to make the led's start at 0 and go to 16 and start over again in the color white, I know it is probably no big deal for some one that knows how to do this but its my first time using addressable LED's and making sketch's.

The data pin I'am using is #3 and my board is Mini Nano V3.0 ATmega328P 5V 16M Micro Controller Board Module Arduino.

I have tried your sketch and only the first 9 out of 16 led's light up.

If you tried MY sketch, ALL 60 LEDs lit up.

Post YOUR sketch.

You are probably powering your LED's from the Arduino board which is not possible. Assuming you are using something like WS2812 or SK6812, you can only power 5-10 of those from the arduino board.