Automation library · AI assistants

Generate marketing ad banners with LINE and Gemini

Started by another system calling it, and works across S3. It hands the judgement calls to Gemini. 12 steps, 2 loops or waits: a working afternoon to understand properly.

MediumCalls a model: Gemini

12 stepsMedium: a working afternoon
0Branches: places the flow splits
2Loops or waits
1Service it connects to

The flow

Starts it 1Model 1Logic 5Service 5

The steps in the order they run, from what starts it.

  1. 1LINE Webhook1WebhookStarts it
  2. 2Extract Data1CodeLogic
  3. 3Optimize Prompt (Marketing)1Google GeminiModel
  4. 4Code1CodeLogic
  5. 5Submit to Nano Banana Pro1Http RequestService
  6. 6Wait1WaitLogic
  7. 7Check Job StatusHttp RequestService
  8. 8Wait for Generation1WaitLogic
  9. 9Parse Result1CodeLogic
  10. 10Download Image1Http RequestService
  11. 11Upload to SAws S3Service
  12. 12HTTP Request2Http RequestService

How it's built

Starts on
Another system calling it
Steps
12, 2 loops or waits
Size
Medium: a working afternoon
Connects to
S3
Model
Gemini

Questions

What does it need to run?

An n8n account, plus your own S3 account, and a key for Gemini. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls Gemini. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 12 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 12 steps before you point it at anything that matters.