import tkinter
import winsound
import time
import math



def countdown(count):

    seconds=math.floor(count%60)
    minutes=math.floor((count/60)%60)
    hours=math.floor((count/3600))
    label['text'] ="Hours: "+ str(hours)+ " Minutes:  " +str(minutes)+ " Seconds: " +str(seconds)

    if count >= 0:
        top.after(1000, countdown,count-1)
    else:
        for x in range(3):
         winsound.Beep(1000,1000)
        label['text']="Time is up!"


def updateButton():
    hour,minute,sec=hoursE.get(),minuteE.get(),secondE.get()
    if hour.isdigit() and minute.isdigit() and sec.isdigit():
        time=int(hour)*3600+int(minute)*60+int(sec)
        countdown(time)

top = tkinter.Tk()
top.geometry("250x150")
hoursT=tkinter.Label(top, text="Hours:")
hoursE=tkinter.Entry(top)
minuteT=tkinter.Label(top, text="Minutes:")
minuteE=tkinter.Entry(top)
secondT=tkinter.Label(top, text="Seconds:")
secondE=tkinter.Entry(top)
hoursT.grid(row=1,column=1)
hoursE.grid(row=1,column=2)
minuteT.grid(row=2,column=1)
minuteE.grid(row=2,column=2)
secondT.grid(row=3,column=1)
secondE.grid(row=3,column=2)
label = tkinter.Label(top)
label.grid(row=5,column=2)

button=tkinter.Button(top,text="Start Timer",command=updateButton)
button.grid(row=4,column=2)

top.mainloop()