Change into your working directory and run:
cargo contract new foobar
This will create a new project folder named
lib.rs file you find initial scaffolded code, which you can use as a starting point.
Quickly check that it compiles and the trivial tests pass with:
cargo +nightly test
Also check that you can build the Wasm file by running:
cargo +nightly contract build
If everything looks good, then we are ready to start programming!