The code can be found at MeasuringDecoherence.ipynb, and a pdf describing further theoretical details at MeasuringDecoherence.pdf.
An example of the code used to generate the animations is animations_example.py.
The submitted video can be found in Youtube.
This code and the video linked below were developped as part of the Quantum Future Challenge 2020, hosted by ScienceatHome and Danish Universities Science Departments (Aarhus University, University of Copenhagen, DTU and SDU)
The code is heavily inspired from the Qiskit Textbook and some other examples found online, along with my own additions were the code was clumsy or difficult to follow.