#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define TFT_CS   15
#define TFT_DC   2
#define TFT_RST  -1
#define TFT_BL   21

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);
  tft.begin();
  tft.fillScreen(ILI9341_BLACK);
  delay(500);
  tft.fillScreen(ILI9341_RED);
  delay(500);
  tft.fillScreen(ILI9341_GREEN);
  delay(500);
  tft.fillScreen(ILI9341_BLUE);
}

void loop() {}