Screen Flashing TFT_320QVT_9341

Hello, I am a beginner in Arduino, and I have a question, what happens is that I am learning to use a TFT screen 320x240_QVT_9341, with the libraries of nkydinkelectronics.com, the UTFT, and for the moment I have only learned how to make circles, but my screen flickers a lot with white background, which I do not like, since you do not have a solid color in the image, what is that?

link of the video: Parpadeo Pantalla TFT_QVT_9341 - YouTube

below I leave the code of my example:

#include <UTFT.h> //Librería UTFT para dibujar en la pantalla.
#include <URTouch.h> //Librería para utilizar el Touch de la pantalla

UTFT myGLCD(ILI9341_16, 38, 39, 40, 41); //Declaramos el controlador de nuestra pantalla

void setup() {
myGLCD.InitLCD();
myGLCD.clrScr();
myGLCD.fillScr(VGA_WHITE);
}

void loop() {
myGLCD.setColor(VGA_RED);
myGLCD.fillCircle(160, 110, 50);
myGLCD.setColor(VGA_WHITE);
myGLCD.drawCircle(160, 110, 51);
myGLCD.drawCircle(160, 110, 52);
myGLCD.drawCircle(160, 110, 53);
myGLCD.drawCircle(160, 110, 54);
myGLCD.drawCircle(160, 110, 55);
myGLCD.drawCircle(160, 110, 56);
myGLCD.drawCircle(160, 110, 57);
myGLCD.drawCircle(160, 110, 58);
myGLCD.drawCircle(160, 110, 59);
myGLCD.drawCircle(160, 110, 60);
myGLCD.setColor(VGA_BLACK);
myGLCD.drawCircle(160, 110, 61);
myGLCD.drawCircle(160, 110, 62);
myGLCD.drawCircle(160, 110, 63);
myGLCD.drawCircle(160, 110, 64);
myGLCD.drawCircle(160, 110, 65);
myGLCD.drawCircle(160, 110, 66);
myGLCD.drawCircle(160, 110, 67);
myGLCD.drawCircle(160, 110, 68);
myGLCD.drawCircle(160, 110, 69);
myGLCD.drawCircle(160, 110, 70);
}