PyQt5 - Skin to checked check box when it get pressed

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys


class Window(QMainWindow):

    def __init__(self):
        super().__init__()

        # setting title
        self.setWindowTitle("Python ")

        # setting geometry
        self.setGeometry(100, 100, 600, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()

    # method for widgets
    def UiComponents(self):

        # creating the check-box
        checkbox1 = QCheckBox('Geek ?', self)

        # setting geometry of check box
        checkbox1.setGeometry(200, 150, 100, 40)

        # changing style sheet code of check box
        # adding skin to checked check box when it get pressed
        checkbox1.setStyleSheet("QCheckBox::checked::pressed"
                                "{"
                                "border-image : url(image.png);"
                                "}")


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())