/Trying-to-program-a-countdown-timer

Hello there! I'm trying to put into action the subjects that I've learned recently, but I don't know how (yet) how to make the printed line be replaced by the next one. Could anyone help me please?

Trying-to-program-a-countdown-timer using Python

Hello there! I'm trying to put into action the subjects that I've learned recently, but I don't know how (yet) how to make the printed line be replaced by the next one. Could anyone help me please?