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

#define ptx1 (A0, INPUT);
#define ptx2 (A1, INPUT);
#define relay1 (2, OUTPUT);
#define relay2 (3, OUTPUT);
#define relay3 (4, OUTPUT);

void setup () {

  Serial.begin(9600);
  tft.begin();
  screenRedrawNecessary = true;
}

void loop()
{
  /* Touch input detection omitted. See below */

  if (screenRedrawNecessary)
  {
    resetAndClearScreen();
    drawIntroText();
    drawTouchButton(b1[0], b1[1], b1[2], b1[3], "Previous");
    drawTouchButton(b2[0], b2[1], b2[2], b2[3], "Next");

    screenRedrawNecessary = false;
  }
}

void drawIntroText(void)
{
  tft.setCursor(15, 15);
  tft.setTextColor(font_colors[active_colors]);
  tft.setTextSize(2);
  tft.println("Hello, World!");

  tft.setCursor(15, 55);
  tft.println("Use the buttons below");
  tft.setCursor(15, 75);
  tft.println("to change the background");
  tft.setCursor(15, 95);
  tft.println("color!");
}