Generate Graphics via Midjourney, GPT & Canvas APIs

## Basic Params
In **Basic Params** node, you need to fill in your PiAPI key which you could check in [My Account]({{ $env.API_BASE_URL }} on [PiAPI]({{ $env.API_BASE_URL }} Other information you need to provide is listed as follow📝: 
1. Theme. The theme refers to the topic that you want to talk about when you start your generation.
2. Scenario. The scenario text usually describe your status about your feeling.
3. Style. The style of the image.
4. Example. The text example shown to LLM to describe a style t you want to generate.
5. Image prompt. Image prompt is usually about the context of the image that you want to generate.