expected ";" at the end of member declaration

I am having trouble trying to fix the code. Can someone try and explain what I’m doing wrong? The error I had is highlighted below:

setup()::Adafruit_NeoPixel //HELP ME HERE 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int delayval = 500; // delay for half a second

void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
#if defined (__AVR_ATtiny85__)
  if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
  // End of trinket special code

  pixels.begin(); // This initializes the NeoPixel library.
}

void loop() {

  // For a set of NeoPixels the first NeoPixel is 0, second is 1, all the way up to the count of pixels minus one.

  for(int i=0;i<NUMPIXELS;i++){

    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, pixels.Color(0,150,0)); // Moderately bright green color.

    pixels.show(); // This sends the updated pixel color to the hardware.

    delay(delayval); // Delay for a period of time (in milliseconds).

  }
}

}

void loop() {
  // put your main code here, to run repeatedly:

}
setup()::Adafruit_NeoPixel //HELP ME

This is not a valid syntax. What are you trying to do? Have you follow the examples code?

Did you look at the Adafruit_NeoPixel library examples to see how it works? Maybe you need a #include there instead?

Only one loop() function is allowed in a sketch.

In the future include the entire text of the error in your post. Paraphrasing leaves out important information.