display graphics + txt on hdmi monitor this way less blinking ( timer + subs )

Hardware MKR Family MKRVIDOR4000
1

here is code

long previousMillis = 0;
long intersensor3 = 5000; // delay time
//--------------------------

#include "VidorGraphics.h"
#include "Vidor_GFX.h"
//----------------------------------
int x=100;
int y=100;
//----------------------------------
Vidor_GFX vdgfx;

void setup() {
Serial.begin(9600);

delay(4000);
// Initialize the FPGA
if (!FPGA.begin()) {
Serial.println("Initialization failed!");
while (1) {}
}

delay(4000);
//-------------------------------------------------- wit achtergrond ------------------------
vdgfx.fillRect(0,0,640,480,vdgfx.White());
//-------------------------------------------------------------------------------------------
}

void loop()
{
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > intersensor3) {
previousMillis = currentMillis;
//---------------------------------------------------------- delay
graphics();
text();
//---------------------------------------------------------- delay
}
//----------------------------------------------------------normal time

//----------------------------------------------------------normal time
}

void text()

{
vdgfx.text.setCursor(150,375);
vdgfx.text.setAlpha(255);
vdgfx.text.setSize(3);
vdgfx.text.setColor(vdgfx.lightBlue());
vdgfx.println("hoi zaterdag");
vdgfx.println(x);
vdgfx.text.setCursor(0,145);
vdgfx.text.setSize(1);
vdgfx.text.setColor(vdgfx.Red());
vdgfx.println("info regel om dat het kan");

}

void graphics()
{
vdgfx.fillCircle(225,225,100 ,vdgfx.lightBlue());
vdgfx.fillCircle(415,225,100 ,vdgfx.lightBlue());
vdgfx.fillCircle(225,225,90 ,vdgfx.White());
vdgfx.fillCircle(415,225,90 ,vdgfx.White());
vdgfx.fillRect(175,220,100,10 ,vdgfx.lightBlue());
vdgfx.fillRect(365,220,100,10 ,vdgfx.lightBlue());
vdgfx.fillRect(410,175,10,100 ,vdgfx.lightBlue());
vdgfx.fillRect(410,175,x,y ,vdgfx.Blue());

vdgfx.drawLine(300, 0, 400, 400, vdgfx.Green());
vdgfx.drawLine(100, 0, 400, 400, vdgfx.White());
vdgfx.drawRect(10, 10, 100, 100, vdgfx.Red());
vdgfx.drawCircle(225,225,100 ,vdgfx.lightBlue());

}

2

To get rid of blinking FPGA should implement double buffering. One where you draw and one that is displayed.