# Generate marketing ad banners with LINE and Gemini: n8n workflow

> Started by another system calling it, and works across S3. It hands the judgement calls to Gemini.

Source: https://millionrounds.com/workflow/generate-marketing-ad-banners-with-line-and-gemini (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [AI assistants](https://millionrounds.com/workflows?category=AI+assistants#library)

# 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.

Medium Calls a model: Gemini

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgenerate-marketing-ad-banners-with-line-and-gemini)

**12 steps** Medium: a working afternoon

**0** Branches: places the flow splits

**2** Loops or waits

**1** Service it connects to

## The flow

Starts it 1 Model 1 Logic 5 Service 5

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

- 1 **LINE Webhook1** Webhook *Starts it*
- 2 **Extract Data1** Code *Logic*
- 3 **Optimize Prompt (Marketing)1** Google Gemini *Model*
- 4 **Code1** Code *Logic*
- 5 **Submit to Nano Banana Pro1** Http Request *Service*
- 6 **Wait1** Wait *Logic*
- 7 **Check Job Status** Http Request *Service*
- 8 **Wait for Generation1** Wait *Logic*
- 9 **Parse Result1** Code *Logic*
- 10 **Download Image1** Http Request *Service*
- 11 **Upload to S** Aws S3 *Service*
- 12 **HTTP Request2** Http Request *Service*

## 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.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgenerate-marketing-ad-banners-with-line-and-gemini)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[S3](https://millionrounds.com/workflows?service=S3#library)

## Workflows like it

Also ai assistants, with the same services where possible, closest in size first.

- [**Instant infographic generator with LINE and Nano Banana Pro** 12 steps · calls a model · S3](https://millionrounds.com/workflow/instant-infographic-generator-with-line-and-nano-banana-pro)
- [**Build a RAG chat system with Aryn DocParse and AWS S3** 13 steps · calls a model · Pinecone, S3](https://millionrounds.com/workflow/build-a-rag-chat-system-with-aryn-docparse-and-aws-s3)
- [**Store AI-generated images in AWS S3: OpenAI image creation** 10 steps · calls a model · S3](https://millionrounds.com/workflow/store-ai-generated-images-in-aws-s3-openai-image-creation)
- [**Create AI-generated books with OpenAI and DALL-E** 18 steps · calls a model · Google Drive, S3](https://millionrounds.com/workflow/create-ai-generated-books-with-openai-and-dall-e)
- [**Generate LinkedIn carousel images from text with Mistral** 26 steps · calls a model · Google Drive, S3](https://millionrounds.com/workflow/generate-linkedin-carousel-images-from-text-with-mistral)