Why Is QPainter Not Painting All Objects

[EverydayDiesel]

Can someone please tell me why rec1 does not get painted in the example below?

@
void MainWindow::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
QRect rect1;
QRect rect2;

rect1 = QRect(500, 560, 280, 30);
painter.drawRect(rect1);

rect2 = QRect(400, 280, 180, 30);
painter.drawRect(rect2);

}@