#include <FastLED.h>
#define NUM_LEDS 16
CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, A3, GRB>(leds, NUM_LEDS);

}

void loop() {
  fill_solid(leds, NUM_LEDS,
             CHSV(
               map(analogRead(A0), 0, 1023, 0, 255),
               map(analogRead(A1), 0, 1023, 0, 255),
               map(analogRead(A2), 0, 1023, 0, 255)
             )
            );

  FastLED.show();
  delay(50);
}