#include <FastLED.h>

#define C_PIN  4  // clock pin
#define D_PIN  5  //data pin
#define BRIGHTNESS 200  //brightness
#define LED_T  APA102   // LED Type
#define COLOR_ORDER GBR
#define NUM_LEDS 72   // number of LED's in my strip.

CRGB leds[NUM_LEDS];  //  name the strip

void setup() {
  delay(1000) ; //power up safety delay
  FastLED.addLeds<LED_T,D_PIN,C_PIN, COLOR_ORDER>(leds, NUM_LEDS);
  FastLED.setBrightness(BRIGHTNESS);
 }

//below is a 2D "grid" multidimensional array already Initialized with data.

int TestGrid[5][4] = {
(0,255,0),(0,0,255),(0,255,0),(0,255,0),
(0,255,0),(0,0,255),(0,255,0),(0,255,0),
(0,255,0),(255,0,255),(255,0,0),(0,255,0),
(0,255,0),(0,0,255),(255,0,255),(0,255,0),
(0,255,0),(0,255,0),(0,255,0),(0,255,0)
};

 void loop() {
 leds[0] = CRGB(255,255,0);
 leds[1] = CRGB(TestGrid[0][1]);
 leds[2] = CRGB(TestGrid[1][2]);
 leds[3] = CRGB(TestGrid[2][1]);
 leds[4] = CRGB(TestGrid[5][2]);
 FastLED.show();
  }