Challenge: Get end-users familiar with Leo by trying out some basic code for writing private applications in the Leo Playground. Solution: Onboarding Tutorial: When users first access the Leo Playground, they are greeted with an interactive onboarding tutorial. This tutorial provides a step-by-step introduction to the Leo language and its features, guiding users on how to write code for private applications. It covers fundamental concepts, syntax, and common patterns, ensuring that users have a solid foundation before diving into practical examples. Instant Feedback and Results: As users write and execute their code in the Leo Playground, instant feedback and results are provided. This allows users to observe the impact of their code changes immediately and debug any errors or issues efficiently. The playground provides clear and meaningful error messages to guide users in resolving problems and understanding the cause of any potential mistakes. Interactive Code Editor: The Leo Playground includes a user-friendly and interactive code editor where users can write, modify, and execute their code. The editor supports syntax highlighting, auto-completion, and error checking to assist users in writing clean and accurate code. Users can easily switch between different sections of their code and preview the results in real time.