我已经尝试了很多年了。我的功能无法正常工作是否有原因

Question

我一直在尝试制作这个简单的计时器，我是 python 的新手（我知道代码很乱）而且我无法让这段代码工作，任何帮助将不胜感激。

我尝试了很多方法，但不确定它们是如何工作的以及如何让它们工作。

        def speedtimersub():#speed timer section
            global paused
            paused = True
            global speedtimernumber
            speedtimernumber = 0
            for widgets in window.winfo_children():#selects all widgets in window
                widgets.destroy()#gets rid of all widgets
            def speedtimerloop():
                print ("medjs")
                def endspeedtimer():
                    paused= True
                    speedtimernumber = 0
                def startspeedtimer():
                    paused = False
                speedtimernumber = 0.00
                speedtimerstart = Button(window, text="start", background="black", font=("Roboto", 15), fg="white",command=startspeedtimer)
                speedtimerstart.place(x=235, y=600)
                speedtimerend = Button(window, text="end/restart", background="black", font=("Roboto", 15), fg="white",command=endspeedtimer)
                speedtimerend.place(x=435, y=600)
                speedtimerpause = Button(window, text="pause/play", background="black", font=("Roboto", 15), fg="white",command=startspeedtimer)
                speedtimerpause.place(x=635, y=600)
                timerlabel = Label(bg="black", fg="white", text=round(speedtimernumber, 3))
                timerlabel.place(x=400, y=400)
                while paused == False:
                    time.sleep(0.01)
                    speedtimernumber=speedtimernumber + 0.01
                    timerlabel = Label(bg="black", fg="white",text=round(speedtimernumber,3))
                    timerlabel.place(x=400, y=400)
            window.after(1, speedtimerloop)

请帮助我，我真的很想开始编码，但这真的让我失望了。