It works great and I share the code I wrote on my github at clock_mpf.

clock_mpf runs as it’s own mode. I run it with game_mode: false so it can be run when my machine starts.
Just copy the files or code from GitHub and create a clock folder inside your modes folder where you put the folders/files and then add/activate the mode in your config.yaml (or whatever file you use).

#example of modes: in config.yaml
modes:
  - clock #Dont forget to add me! 

#example of modes: in config.yaml
modes:
  - clock #Dont forget to add me! 

The GitHub code has some example how to use it in clock.yaml.
Here is how it’s built…

1. When event mode_clock_started happens it first sets the time.
2. Event mode_clock_started starts a timer that loops and every time it completes with event timer_set_clock_time_complete it writes the time to the machine variable named time_variable.
3. Machine variable set_date is written to every time time_variable is saved using the event time_variable_saved.
4. You can always trigger set_date or set_clock with your own events.
   Just use event_player (or some other player) and set_date or set_clock.

#from clock.yaml

event_player:
    time_variable_saved: set_date #Set the date when time_variable is written.
    timer_set_clock_time_complete: set_clock #write time to set_clock when timer is complete.
    mode_clock_started: set_clock #At start of mode so it doesn't take 10 seconds (timers time) to set clock and date.

#from clock.yaml

event_player:
    time_variable_saved: set_date #Set the date when time_variable is written.
    timer_set_clock_time_complete: set_clock #write time to set_clock when timer is complete.
    mode_clock_started: set_clock #At start of mode so it doesn't take 10 seconds (timers time) to set clock and date.

set_date and set_clock writes date and time to machine variables named time_variable and date_variable. Use it in any way you want.

#from: clock.yaml
machine_vars:
    time_variable:
        value_type: str
        initial_value: banan
        persist: true      
    date_variable:
        value_type: str
        initial_value: banan
        persist: true     

#from: clock.yaml
machine_vars:
    time_variable:
        value_type: str
        initial_value: banan
        persist: true      
    date_variable:
        value_type: str
        initial_value: banan
        persist: true     

Questions? Make a comment.

1. Load your MPFWindow scene in Godot.
2. Add any Child Node, I suggest you add a label.
3. Make the label hidden so it don’t show up in all your scenes.
4. Right click on your Label and choose Attach script. Create the gd-script.
5. Go to Script at the top or double click the script in the FileSystem (inside Godot).
6. Add a function like below…. if you have another node than Label the extends differs.

extends Label

func _ready():
      Input.mouse_mode = Input.MOUSE_MODE_HIDDEN

extends Label

func _ready():
      Input.mouse_mode = Input.MOUSE_MODE_HIDDEN