// only coloring three of nine pixels

#include <FastLED.h>
#define NUMPIX    9
#define DATAPIN   5
#define MAXBRIGHT 255
CRGB led[NUMPIX];

// const int colors [][3] PROGMEM = { // needs read_byte()
const int colors [][3] = {
  {255,   0,   0},
  {255,   0, 127},
  {255,   0, 255},
  {255, 127, 255},
  {255, 127, 127},
  {255, 127,   0},
  {255, 255,   0},
  {255, 255, 127},
  {255, 255, 255},
};
int colorsize = sizeof(colors) / sizeof(colors[0]);

void setup() {
  Serial.begin(115200);

  FastLED.addLeds<WS2812B, DATAPIN, GRB>(led, NUMPIX);
  FastLED.setBrightness(MAXBRIGHT);
  FastLED.clear();
  FastLED.show();

  // printcolors();
  showcolors();
}

void showcolors() {
  for (int i = 0; i < colorsize; i++) {
    for (int j = 0; j < 3; j++) {
      led[i] = CRGB(colors[i][0], colors[i][1], colors[i][2]);
      FastLED.show();
    }
    Serial.println();
  }
}

void printcolors() {
  for (int i = 0; i < colorsize; i++) {
    Serial.print("(");
    for (int j = 0; j < 3; j++) {
      spacepad(colors[i][j]);
      Serial.print(colors[i][j]);
      if (j != 2)
        Serial.print(",");
    }
    Serial.println(")");
  }

}

void loop() {
  // empty
}

void spacepad(int val) { // receiving an element in an array
  if (val < 100) Serial.print(" ");
  if (val < 10) Serial.print(" ");
}