Arduino Touchscreen + HC-SR04 sensor (working code)

#include <Adafruit_GFX.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_STMPE610.h>
#include <UTFT.h>
#include <Adafruit_ILI9341.h>

#define TS_MINX 150
#define TS_MINY 150
#define TS_MAXX 4000
#define TS_MAXY 4000

#define STMPE_CS 8
Adafruit_STMPE610 ts = Adafruit_STMPE610(STMPE_CS);
#define TFT_CS 10
#define TFT_DC 9
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define FRAME_X -500
#define FRAME_Y -500
#define FRAME_W 3800
#define FRAME_H 4000

int trigPin = 22;
int echoPin = 49;
long duration, cm;
int x;
int led = 45;
boolean drawingstate = true;

void drawing1()
{
  tft.fillRect(FRAME_X, FRAME_Y, FRAME_W, FRAME_H, VGA_BLACK);
  tft.setCursor(FRAME_X + 622, FRAME_Y + 602);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(6);
  tft.println("-");
  tft.setCursor(FRAME_X + 620, FRAME_Y + 600);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(6);
  tft.println("-");
  delay(100);
  tft.setCursor(FRAME_X + 622, FRAME_Y + 602);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(6);
  tft.println("--");
  tft.setCursor(FRAME_X + 620, FRAME_Y + 600);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(6);
  tft.println("--");
  delay(100);
  tft.setCursor(FRAME_X + 622, FRAME_Y + 602);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(6);
  tft.println("-->");
  tft.setCursor(FRAME_X + 620, FRAME_Y + 600);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(6);
  tft.println("-->");
}



void drawing2()
{
  tft.fillRect(FRAME_X, FRAME_Y, FRAME_W, FRAME_H, VGA_BLACK);
  tft.setCursor(FRAME_X + 542, FRAME_Y + 602);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(6);
  tft.println("70 KM/H");
  tft.setCursor(FRAME_X + 540, FRAME_Y + 600);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(6);
  tft.println("70 KM/H");
}



void drawing3()
{
  tft.fillRect(FRAME_X, FRAME_Y, FRAME_W, FRAME_H, VGA_BLACK);
  tft.setCursor(FRAME_X + 659, FRAME_Y + 593);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(7);
  tft.println("^");
  tft.setCursor(FRAME_X + 659, FRAME_Y + 595);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(7);
  tft.println("|");
  tft.setCursor(FRAME_X + 659, FRAME_Y + 602);
  tft.setTextColor(VGA_RED);
  tft.setTextSize(7);
  tft.println("|");
  tft.setCursor(FRAME_X + 658, FRAME_Y + 592);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(7);
  tft.println("^");
  tft.setCursor(FRAME_X + 658, FRAME_Y + 594);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(7);
  tft.println("|");
  tft.setCursor(FRAME_X + 658, FRAME_Y + 601);
  tft.setTextColor(VGA_WHITE);
  tft.setTextSize(7);
  tft.println("|");
}

void drawing4(){
  tft.fillRect(FRAME_X, FRAME_Y, FRAME_W, FRAME_H, VGA_WHITE);
}

void setup(void)
{
  Serial.begin (9600);
  Serial.println("inside 'void setup(void) loop");
  delay(500);
  pinMode(trigPin, OUTPUT);
  pinMode(led, OUTPUT);
  pinMode(echoPin, INPUT);
  tft.begin();
  if (!ts.begin()) {
    Serial.println("Unable to start touchscreen.");
  }
  else {
    Serial.println("Touchscreen started.");
  }

  tft.fillScreen(VGA_BLACK);
  tft.setRotation(1);
  delay(500);

  drawing3();

}


void loop()
{
  Serial.println("inside 'void loop()' loop");
  delay(1000);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  int cm = (duration / 2) / 29.1;
  int x = cm;
  Serial.println("setting up integers \n");
  delay(500);

  if (x < 50) {
    Serial.println("inside 'do while' loop \n");
    Serial.println("drawing Frame2 \n");
    drawing2();
    digitalWrite(led, LOW);
    delay(500);
    Serial.println("drawing Frame1 \n");
    drawing1();
    delay(500);
    Serial.println("drawing Frame2 \n");
    drawing2();
    digitalWrite(led, LOW);
    delay(500);
    Serial.println("drawing Frame1 \n");
    drawing1();


  }
  else {
    Serial.println("drawing Frame3 \n");
        drawing3();
        delay(500);
    }

  digitalWrite(led, HIGH);
  Serial.print(cm);
  Serial.print("cm \n");
  delay(250);

}