sdigits sevseg getsevsegstr(seconds stoprowsmiddlerowsbottomrow sdigits splitlines( display the digits print(htoprow mtoprow stoprow print(hmiddlerow mmiddlerow smiddlerow print(hbottomrow mbottomrow sbottomrow if secondsleft = print( print(boom *' break print( print('press ctrl- to quit ' time sleep( insert one-second pause secondsleft - except keyboardinterrupt print('countdownby al sweigart al@inventwithpython com' sys exit(when ctrl- is pressedend the program after entering the source code and running it few timestry making experimental changes to it on your ownyou can also try to figure out how to do the followingprompt the user to enter the starting countdown time let the user enter message to display at the end of the countdown exploring the program try to find the answers to the following questions experiment with some modifications to the code and rerun the program to see what effect the changes have what happens if you change secondsleft on line to secondsleft what happens if you change the on lines and to what happens if you change time sleep( on line to time sleep( ) what happens if you change secondsleft - on line to secondsleft - what happens if you delete or comment out print('\ on line what error message do you get if you delete or comment out import sevseg on line countdown