> For the complete documentation index, see [llms.txt](https://brlabelectronics.gitbook.io/tutorials-1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code.md).

# The App Code

- [Particle Web IDE](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/particle-web-ide.md)
- [Blynk Library](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/blynk-library.md)
- [Writing The Code](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code.md)
- [Comment Header](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/comment-header.md)
- [Define Blynk Objects](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/define-blynk-objects.md)
- [Define Global Variables](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/define-global-variables.md)
- [Void Setup()](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/void-setup.md)
- [Void Loop()](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/void-loop.md)
- [BLYNK\_WRITE()](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/writing-the-code/blynk_write.md)
- [Application Code](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/application-code.md)
- [Control The World Around You](https://brlabelectronics.gitbook.io/tutorials-1/the-app-code/control-the-world-around-you.md)