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# Lecture step 2: click the cookie as fast as possible

![The game after 15 seconds of clicking](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/048-the-coockie-factory-new/raw/branch/main/docs/images/step-2.png)

## What the assignment asks

Create a bot with Selenium and Python that clicks the cookie as fast as possible. It must dismiss the language selection by itself before it starts.

## What we built

- `open_game` loads the page.
- `dismiss_language` waits until the English button is visible, clicks it, and then waits until the big cookie is visible. The game needs a few seconds to start after the language is chosen, so the bot polls (every 0.2 seconds, at most 20 seconds) instead of sleeping for a fixed time.
- `click_cookie` clicks `#bigCookie` once. If a banner or a re-render blocks the click for a moment, the bot tries again on the next round.
- A loop calls `click_cookie` until the time is up. In a 15 second run in the container the bot clicked 344 times, and the screenshot above shows 342 cookies.

```bash
cookie-clicker-bot --headless --duration 15 --screenshot step-2.png
```

## What we gained in this step

- **Wait for a condition, not for a time.** A fixed `sleep` is either too short (the bot fails) or too long (the bot wastes time). Polling for "the cookie is visible" is both faster and safer.
- **Keep the browser behind a port.** The loop knows only `GamePort` (`open_game`, `dismiss_language`, `click_cookie`, ...). The Selenium code lives in one adapter, so the loop is tested with a fake game in a few milliseconds.
- **Time a loop with a clock you can replace.** `click_and_buy` takes the clock as a parameter; the tests give it a fake clock and check the number of clicks exactly.