Follow the instructions. Don't click on a door until the package disappears (later versions will control this better). Still need to add code to track stats for correct/incorrect picks... ran out of time!
More information here: https://medium.com/@micah.shute/understanding-the-monty-hall-problem-e9aa24cc62ac Later versions will have an "auto" feature that will endlessly repeat and demonstrate that it's not 50-50 after one door is eliminated: https://scratch.mit.edu/projects/297146617/
