GPT答：

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1. Create a canvas with dimensions of your choice.
2. Draw a background of a coffee shop window with street view outside.
3. Draw the outline of a cute girl sitting in front of the window, with her hands supporting her chin.
4. Add details to the girl's face, such as eyes, nose and mouth.
5. Draw the girl's hair and clothes in an anime style that matches the overall theme.
6. Shade and colorize the drawing to create depth and vibrancy.

Optional:
7. Add additional elements to enhance the scene, such as cups or plates on the table or people walking by outside.
8. Experiment with different color palettes or lighting effects to create different moods for your illustration.

Note: These instructions are general guidelines for creating an AI-generated illustration based on your description; specific tools and techniques may vary depending on which software you use for drawing/illustration purposes (e.g., Adobe Illustrator).