My First PyQt5 app

Promodoro.py

import sys
from PyQt5.QtWidgets import QApplication, QWidget,QLabel, QMessageBox, QPushButton
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtCore import pyqtSlot, QTimer, QDateTime, QDate, QTime
from Ui_Pomodoro import Ui_Dialog
from PyQt5 import QtCore
import time





class MyTimer(QWidget):
    def __init__(self):
        super().__init__()

        self.setGeometry(600,300,380,290)
        self.setFixedSize(self.size())



        # show image as bg
        label = QLabel(self)
        pixmap = QPixmap('promodoro.png')
        # pixmap = QPixmap('a3.jpg')
        label.setPixmap(pixmap)
        self.resize(pixmap.width(), pixmap.height())

        # call designer UI
        self.ui = Ui_Dialog()
        self.ui.setupUi(self)

        # how many chr in put into lcd
        self.ui.lcdNumber.setDigitCount(5) 

        # Create a timer
        self.timer = QTimer()

        # Connect the timer to the appropriate slot
        # this need to be at this level!
        self.timer.timeout.connect(self.count_down)



    @pyqtSlot()
    def on_pushButtonStop_clicked(self):
        self.timer.stop()
        self.min = 0
        self.sec = 0
        self.ui.lcdNumber.display(f"{str(self.min)}:{str(self.sec)}")



    @pyqtSlot()
    def on_pushButtonStart_clicked(self):
        # get sec value
        self.sec = self.ui.spinBoxSec.value()
        self.min = self.ui.spinBoxMin.value()
        self.ui.lcdNumber.display(f"{str(self.min)}:{str(self.sec)}")
        

        # Wait one second between slot calls


        self.timer.start(1000)
        


    def count_down(self):
        """ 
        it will count down the sec 
        it will decrease one min when sec hit 0
        it will stop when sec and min are both equal to 0
        
        """   
        self.ui.lcdNumber.display(f"{str(self.min)}:{str(self.sec)}")
        
        print(self.sec)

        if self.sec == 0 and self.min > 0:
            print('min minus one')
            self.min -= 1
            self.sec = 59
        elif self.sec == 0 and self.min == 0:
            print('stop timer')
            self.timer.stop()
            self.ui.spinBoxSec.setValue(0)
            self.ui.spinBoxMin.setValue(0)
            self.msg()

        else:
            self.sec = self.sec - 1

    
    def msg(self):
        reply = QMessageBox.information(self,                       
                                    "Time is Up",
                                    "Have a break!!",
                                    QMessageBox.Yes | QMessageBox.No)



if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyTimer()
    win.show()
    sys.exit(app.exec_())

Ui_Pomodoro.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'd:\ben-code\python\pyqt5\project-promodoro\Pomodoro.ui'
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(382, 300)
        font = QtGui.QFont()
        font.setBold(False)
        font.setWeight(50)
        Dialog.setFont(font)
        self.labelMin = QtWidgets.QLabel(Dialog)
        self.labelMin.setGeometry(QtCore.QRect(20, 200, 31, 21))
        font = QtGui.QFont()
        font.setPointSize(10)
        font.setBold(False)
        font.setWeight(50)
        self.labelMin.setFont(font)
        self.labelMin.setAutoFillBackground(True)
        self.labelMin.setObjectName("labelMin")
        self.lcdNumber = QtWidgets.QLCDNumber(Dialog)
        self.lcdNumber.setGeometry(QtCore.QRect(10, 100, 91, 41))
        font = QtGui.QFont()
        font.setPointSize(9)
        font.setBold(False)
        font.setWeight(50)
        font.setStrikeOut(False)
        font.setKerning(False)
        self.lcdNumber.setFont(font)
        self.lcdNumber.setMode(QtWidgets.QLCDNumber.Dec)
        self.lcdNumber.setObjectName("lcdNumber")
        self.pushButtonStart = QtWidgets.QPushButton(Dialog)
        self.pushButtonStart.setGeometry(QtCore.QRect(90, 260, 93, 28))
        font = QtGui.QFont()
        font.setPointSize(12)
        font.setBold(False)
        font.setWeight(50)
        self.pushButtonStart.setFont(font)
        self.pushButtonStart.setObjectName("pushButtonStart")
        self.pushButtonStop = QtWidgets.QPushButton(Dialog)
        self.pushButtonStop.setGeometry(QtCore.QRect(190, 260, 93, 28))
        font = QtGui.QFont()
        font.setPointSize(12)
        font.setBold(False)
        font.setWeight(50)
        self.pushButtonStop.setFont(font)
        self.pushButtonStop.setObjectName("pushButtonStop")
        self.spinBoxMin = QtWidgets.QSpinBox(Dialog)
        self.spinBoxMin.setGeometry(QtCore.QRect(60, 200, 42, 22))
        self.spinBoxMin.setObjectName("spinBoxMin")
        self.labelSec = QtWidgets.QLabel(Dialog)
        self.labelSec.setGeometry(QtCore.QRect(20, 230, 31, 21))
        font = QtGui.QFont()
        font.setPointSize(10)
        font.setBold(False)
        font.setWeight(50)
        self.labelSec.setFont(font)
        self.labelSec.setAutoFillBackground(True)
        self.labelSec.setObjectName("labelSec")
        self.spinBoxSec = QtWidgets.QSpinBox(Dialog)
        self.spinBoxSec.setGeometry(QtCore.QRect(60, 230, 42, 22))
        self.spinBoxSec.setObjectName("spinBoxSec")

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.labelMin.setText(_translate("Dialog", "Mins"))
        self.pushButtonStart.setText(_translate("Dialog", "Start"))
        self.pushButtonStop.setText(_translate("Dialog", "Stop"))
        self.labelSec.setText(_translate("Dialog", "Sec"))