# Field and game elements
In the FTC competition, the robot needs to run inside a 12X12 field. Having access to the field and a game element will be super useful to practice and iterate your robot.
### Game elements
Every year the game has different game elements. Usually you always need to buy the game elements at for that season.
### Field tiles
The game field is 12X12 field, containing 36 of 2X2 tiles. You can buy the official FTC game tiles from [andymark](https://www.andymark.com/products/soft-tiles-for-first-tech-challenge-field-options?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6OkNhdGFsb2c6OkNhdGVnb3J5LzVhZjhlNjY2YmM2ZjZkNWUzNmYyM2FlOA). If you want to save the cost, you can also buy some cheap 2X2 tiles from stores like walmart at the beginning, just to test the robot running on the tile.
### Field Perimeter/Wall
You can buy the official perimeter from [Andymark](https://www.andymark.com/products/first-tech-challenge-perimeter-kit-b).
To save the cost, you may also DIY the perimeter following this [guide](https://www.firstinspires.org/sites/default/files/uploads/resource_library/ftc/low-cost-field-perimeter-guide.pdf). The DIY version costs about 100$, vs official version 645$
Please note, game elements are required. The full field is not required. You could build and test your robot, and later go to another team's field to practice/iterate.
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