setup

Each script should have instructions + the command on how to run it. But in general you'll need to install kotlin like so:

# install kotlin
brew install kotlin

# run the script
kotlin 0.hello.main.kts Hello 🌎

Alternatively, if you want to make the script executable

chmod +x 0.hello.main.kts

# you can now run the script like so:
./0.hello.main.kts Hello 🌎

Note: The first time you run the script it'll look like it's taking forever, thereafter the script runs super fast.