#include <FastLED.h>

#define LED_PIN     7
#define NUM_LEDS    20

CRGB leds[NUM_LEDS];

void setup() {

  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
  
}

void loop() {
  
  leds[0] = CRGB(255, 0, 0);FastLED.show();delay(500);  
  leds[1] = CRGB(0, 255, 0);FastLED.show();delay(500);
  leds[2] = CRGB(0, 0, 255);FastLED.show();delay(500);
  leds[3] = CRGB(150, 0, 255);FastLED.show();delay(500);
  leds[4] = CRGB(255, 200, 20);FastLED.show();delay(500);
  leds[5] = CRGB(85, 60, 180);FastLED.show();delay(500);
  leds[6] = CRGB(50, 255, 20);FastLED.show();delay(500);
  leds[7] = CRGB(255, 0, 0);FastLED.show();delay(500);  

  leds[8] = CRGB(0, 255, 0);FastLED.show();delay(500);
  leds[9] = CRGB(255, 0, 0);FastLED.show();delay(500);  
  leds[10] = CRGB(0, 255, 0);FastLED.show();delay(500);
  leds[11] = CRGB(0, 0, 255);FastLED.show();delay(500);
  leds[12] = CRGB(150, 0, 255);FastLED.show();delay(500);
  leds[13] = CRGB(255, 200, 20);FastLED.show();delay(500);
  leds[14] = CRGB(85, 60, 180);FastLED.show();delay(500);
  leds[15] = CRGB(50, 255, 20);FastLED.show();delay(500);


}