Creating new widget in PyQT5 using timer

Question

I'm trying to create widgets and place it on main window. Calling self.newlabel1() directly from initUI method works fine. Calling self.newlabel2() from timer event handler doesn't work (label 2 doesn't appear). What am I doing wrong?

from PyQt5.QtWidgets import QWidget, QApplication, QLabel
from PyQt5.QtCore import Qt, QBasicTimer

win_width, win_height = 400, 400
win_x, win_y = 200, 200
txt_title = "App"

class MainWindow(QWidget):
    def __init__(self, parent=None, flags=Qt.WindowFlags()):
        super().__init__(parent=parent, flags=flags)
        self.initUI()
        self.set_appear()
        self.show()

    def initUI(self):
        self.q0 = QLabel("Label 0",self)
        self.q0.move(200,100)
        self.newlabel1()
        self.timer = QBasicTimer()
        self.timer.start(200, self)

    def newlabel1(self):
        self.q1 = QLabel("Label 1",self)
        self.q1.move(200,150)

    def newlabel2(self):
        self.q2 = QLabel("Label 2",self)
        self.q2.move(200,200)

    def timerEvent(self, event):
        self.newlabel2()
        self.timer.stop()

    def set_appear(self):
        self.setWindowTitle(txt_title)
        self.resize(win_width, win_height)
        self.move(win_x, win_y)

def main():
    app = QApplication([])
    mw = MainWindow()
    app.exec_()
main()