Idea (as discussed previously):
Overlay a semi-transparent image on whatever the screen shows with something like "Beweeg de telescoop om de radio-hemel te verkennen (ja! u mag aan de telescoop komen)"
The image should appear after say 40 seconds of inactivity (note that the sensors have some jitter, so inactivity detection requires some tolerance).
Idea (as discussed previously): Overlay a semi-transparent image on whatever the screen shows with something like "Beweeg de telescoop om de radio-hemel te verkennen (ja! u mag aan de telescoop komen)"
The image should appear after say 40 seconds of inactivity (note that the sensors have some jitter, so inactivity detection requires some tolerance).