Start the simulation by running the file 'run.py' with the command 'python3 executable.py' on the console, inside the folder BB84-protocol.
For more information, read the document 'QuantumKeyDistribution.pdf' (https://github.com/rebekkaka/BB84-protocol/blob/master/QuantumKeyDistribution.pdf), in particular section 5.2.
Most important reference: M. A. Nielsen and I. L. Chuang.Quantum Computation and Quantum Information. Cambridge UniversityPress, 2010. ISBN: 9781107002173