probleme to star for LED

[Zudva]

For this: FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);

I have error on Arduino UNO:

In file included from /Users/Master/Downloads/Arduino/ArtnetFastLED/ArtnetFastLED.ino:8:0:
/Users/Master/Downloads/Arduino/libraries/FastLED/FastLED.h:17:21: note: #pragma message: FastLED version 3.001.006

pragma message "FastLED version 3.001.006"

                 ^

/Users/Master/Downloads/Arduino/ArtnetFastLED/ArtnetFastLED.ino: In function 'void setup()':
ArtnetFastLED:69: error: 'leds' was not declared in this scope
FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);
^
exit status 1
'leds' was not declared in this scope