#include <FastLED.h>
#define NUM_LEDS 16
#define DATA_PIN 2

CRGB leds[NUM_LEDS];

void setup() {
    FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS); 
}

void loop() {
  int pots = analogRead(A0);
  int P1 = map(pots, 0, 1023, 0, NUM_LEDS);
    int pots1 = analogRead(A1);
  int P2 = map(pots1, 0, 1023, 0, NUM_LEDS);
    int pots2 = analogRead(A2);
  int P3 = map(pots2, 0, 1023, 0, NUM_LEDS);

  for(int i=0;i<P1;i++) {leds[i] = CRGB::Red;}FastLED.show();
  for(int i=P1;i<NUM_LEDS;i--) {leds[i] = CRGB::Black;} 

  for(int i=0;i<P2;i++) {leds[i] = CRGB::Green;};FastLED.show();
  for(int i=P2;i<NUM_LEDS;i++) {leds[i] = CRGB::Black;}


  for(int i=0;i<P3;i++) {leds[i] = CRGB::Blue;}FastLED.show();
  for(int i=P3;i<NUM_LEDS;i++) {leds[i] = CRGB::Black;}

}