the button flash method flashes the widgetbut it' easy to dynamically change other appearance options of widgetssuch as buttonslabelsand textwith the widget config method for instanceyou can also achieve flash-like effect by manually reversing foreground and background colors with the widget config method in scheduled after callbacks largely for funexample - specializes the alarm to go step further example - pp \gui\tour\alarm-hide py customize to erase or show button on after(timer callbacks from tkinter import import alarm class alarm(alarm alarm)def __init__(selfmsecs= )self shown false alarm alarm __init__(selfmsecsdef repeater(self)self bell(if self shownself stopper pack_forget(elseself stopper pack(self shown not self shown self after(self msecsself repeaterchange alarm callback default second on every millisecs beep now hide or erase button now or reverse colorsflash toggle state for next time reschedule handler if __name__ ='__main__'alarm(msecs= mainloop(when this script is runthe same window appearsbut the button is erased or redrawn on alternating timer events the widget pack_forget method erases (unmapsa drawn widget and pack makes it show up againgrid_forget and grid similarly hide and show widgets in grid the pack_forget method is useful for dynamically drawing and changing running gui for instanceyou can be selective about which components are displayedand you can build widgets ahead of time and show them only as needed hereit just means that users must press the button while it' displayedor else the noise keeps going example - goes even further there are handful of methods for hiding and unhiding entire top-level windowsto hide and unhide the entire window instead of just one widget within ituse the top-level window widget withdraw and deiconify methods the withdraw methoddemonstrated in example - completely erases the window and its icon (use iconify if you want the window' icon to appear during hidethe lift method raises window above all its siblings or relative to another you pass in this method is also known as tkraisebut not raise--its name in tk-because raise is reserved word in python time toolsthreadsand animation