To use this application as a desktop widget:
1. Generate a Gambas executable of the application
2. Create an Auto-Start Item. In Linux Mint use the Start-Programs-Dialogue in the Control Centre
   and enter something like "/user/Gambas/Gambas-Clock/Gambas-Clock.Gambas" as a start command.

Here are the URLs where I found the used graphics.

Disclaimer:

Please use the URLs under your own risk. I will not be responsible for any damage or consequence.

https://openclipart.org/detail/16605/clock-sportstudio-design

https://openclipart.org/detail/2998/clock-+-calendar

https://openclipart.org/detail/2999/clock-+-calendar

http://publicdomainvectors.org/en/free-clipart/Modern-wall-clock-vector-image/11289.html

http://images.google.de/imgres?imgurl=http%3A%2F%2Fwww.opensourcealternative.org%2Fwp-content%2Fuploads%2F2014%2F03%2Fmodern-clock-vector.png&imgrefurl=http%3A%2F%2Fwww.opensourcealternative.org%2Ffree-modern-clock-vector-art%2F&h=494&w=493&tbnid=bM6rBj83XRGk7M%3A&docid=h311n3x6HY6SFM&ei=8uRSV769NsOF6ASc8pfYCQ&tbm=isch&iact=rc&uact=3&dur=560&page=1&start=0&ndsp=15&ved=0ahUKEwi-_uzvyY7NAhXDApoKHRz5BZsQMwgtKAgwCA&bih=568&biw=891

Enjoy
16.05.2016 Claus