# Prepare the project · Big data analysis with Chromia and PySpark · Learn Chromia

> Build a Tic Tac Toe game with a Rell backend on Chromia and a Unity client.

Source: https://chromia.com/learn/big-data/project-launch/

Big data analysis with Chromia and PySparkLesson 3 of 6

1. [01Analyzing Chromia blockchain data with PySpark](https://chromia.com/learn/big-data/introduction/)
2. [02Set up your project](https://chromia.com/learn/big-data/setup/)
3. [03Prepare the project](https://chromia.com/learn/big-data/project-launch/)
4. [04Run the project](https://chromia.com/learn/big-data/project-run/)
5. [05Blockchain components](https://chromia.com/learn/big-data/blockchain-side-description/)
6. [06Python components](https://chromia.com/learn/big-data/python-side-description/)

[Learn](https://chromia.com/learn/)[Big data analysis with Chromia and PySpark](https://chromia.com/learn/big-data/)

03 / 06Intermediate

# Prepare the project

## Prepare the blockchain component

### Go to the blockchain directory

shell

```nolines
cd rell
```

### Run the blockchain component

shell

```nolines
chr node start
```

## Prepare the PySpark component

### Go to the PySpark directory

shell

```nolines
cd pyspark
```

### Add these values to the .env file

env

```
POSTCHAIN_TEST_NODE=http://localhost:7740
BLOCKCHAIN_TEST_RID=brid # This can be found in the terminal of the running chr node
PRIV_KEY=your_private_key # Enter the private key of the signer here
```

Written for this site from Chromia’s public course. Code samples are the course’s own.

[← Previous**Set up your project**](https://chromia.com/learn/big-data/setup/)[Next →**Run the project**](https://chromia.com/learn/big-data/project-run/)

On this page

* [Prepare the blockchain component](#prepare-the-blockchain-component)
* [Prepare the PySpark component](#prepare-the-pyspark-component)