[Ask] basic command sl4a in Qphyton

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hi everyone, I use Qpython 3 for android, the default application have included a few sample using sl4a unit, but I am still confused.
My question is:
how to start creating a new project using sl4a, because I tried from making a new project on the console and then I copy the sample script and run it but instead an error?
and from where i can know the basic commands / syntax that exist in the unit sl4a?

thanks & sorry about my english.