ENH: Animation to sound detector

[TiagoFar78]

Is your feature request related to a problem? Please describe.
Right not sound detectors values are shown to guards as a static text. This sould be an animation as if it was capturing some noise and chaning its values by a little.

Describe the solution you'd like
I want that the sound detectors values in the side bar look like the ones in the Prison Life game. Always changing a little bit.