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lake +leanprover/lean4:nightly-2023-02-04 new my_project math. Themathkeyword adds mathlib4 to the dependencies of your project, so that you can use import Mathlib in your project files. Go inside the my_project folder and runlake update, thenlake exe cache get, and thenmkdir MyProject. Run VS Code by runningcode .and make sure you are in my_project. The .lean files for your project should go in the MyProject folder. $\endgroup$