Well figuring this out will be a mixture between exploring the code by yourself and asking questions in the Arduino-Foum or maybe the author
So what I did is surfing to the main-page of the Parola-GitHub-website
and scrolled down to see if there is some documentation
and voila there is some documentation
Parola discussion on the ** Arduino forum ** and kits available from ElectroDragon.
Additional information also at ** my blog **.
As an exercise you should do this on your own.
The ideal way of using this forum is to show some own effort and if a question arises to post links that you found and your question is related to as a real link to make it easy for your (potential) helpers to lookup the information and then asking a specific question including your complete actual and your guessing where in the code the problem sits (and waits for solving)
best regards Stefan