For this to be possible, you should dedicate the computer for this purpose and not connect it to the internet after setup. Do not follow these procedures if you use the computer for other purposes.
=== Mac ===
From the Apple menu choose System Preferences and make the following changes
* Desktop and Screen Saver: Screen saver set to Start after Never.
** Select the user account and Login Items. Click the Plus Sign (add) button at the bottom of the window
*** Navigate to the Applications folder and select Sforzando
=== PC ===