Be careful: if you choose to delete a file, you will not be able to recover it unless you've saved a copy
Lighter colours are great for coding at day time. Some people prefer coding at night:
Darker colours look more like a command prompt. Lighter colours look more like an app window:
Running your code line by line can be a useful way of finding bugs
Choosing a longer time between animating each line helps you understand and explain your code as it runs
Making your output window transparent helps you see your code underneath