Code help Artnet two universe

Using Arduino LEDs and Multiplexing
5

Riva:
Exactly how many Neopixel LED's do you want to control. The example you posted seems pretty much all you need once you have entered the correct values in the required places as it handles multi universes.

const int numLeds = 240; // change for your setup

const int startUniverse = 0; // CHANGE FOR YOUR SETUP most software this is 1, some software send out artnet first universe as 0.

// Change ip and mac address for your setup
byte ip[] = {192, 168, 2, 2};
byte mac[] = {0x04, 0xE9, 0xE5, 0x00, 0x69, 0xEC};

Hello,
I want to control 340 LEDs, each led by the 3 channels that have 1020 channels need them. If the universe of 512 channels 1, 2 univers I have I need. How do I make an arrangement.
I'm sorry for my english corrupt
Thank you.