Simple qt application that may fix lcd bad pixel

lcd-fix.cpp

#include <QApplication>
#include <QMainWindow>
#include <QPalette>
#include <QTimer>

/* For compile:
	g++ main.cpp -o lcd-fix $(pkg-config --cflags --libs Qt6Widgets Qt6Core Qt6Gui) -fPIC
*/

static QMainWindow *mainWindow;

QColor colors[] = {Qt::red, Qt::green, Qt::blue};

static void changeColor(){
    QPalette palette = mainWindow->palette();
    palette.setColor(QPalette::Window, colors[rand()%3]);
    mainWindow->setPalette(palette);
    mainWindow->setAutoFillBackground(true);
}

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    mainWindow = new QMainWindow();

    mainWindow->showFullScreen();
    QTimer *timer = new QTimer(mainWindow);
    mainWindow->connect(timer, &QTimer::timeout, mainWindow, changeColor);
    timer->start(1000/60);

    return app.exec();
}