> For the complete documentation index, see [llms.txt](https://roogame.gitbook.io/roogame/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://roogame.gitbook.io/roogame/ultimate-stats-framework/creating-your-dynamic-gameplay-formulas/quick-start.md).
# Quick Start
This chapter shows you how to create a damage formula for a normal attack.
Before starting this chapter, make sure you have completed the [Attribute System](/roogame/ultimate-stats-framework/creating-your-attribute-system.md) chapter and understand how to configure and use Stats and Attributes.
### Create a Formula
First, open the **Stat Designer** and switch to **Formula** in the top-left corner.
Next, add an **Attack** category in the **Category** panel.
Select the **Attack** category, then add a **BasicAttackDamage** formula in the **Formula** panel.
Select the **BasicAttackDamage** formula you just created. In the **Formula** properties panel on the right, enter:
`-1 * max(0, self.stat.Attack - target.stat.Defense)`
This formula calculates the damage based on the attacker’s **Attack** and the target’s **Defense**.
* `self.stat.Attack` represents the attacker’s Attack value.
* `target.stat.Defense` represents the target’s Defense value.
* `max(0, ...)` ensures the calculated damage will never be less than `0`.
* `-1 *` converts the result into a negative value, allowing it to be applied directly as a reduction to the target’s HP.
Click **Use** in the top-right corner to save your changes. The formula is now ready to use.
To calculate the formula, use the **Calculate Formula** node from Ultimate Stats Framework Component and select the formula tag you just created:
`MyRPGGame.Formula.Attack.BasicAttackDamage`
Then, pass in the Ultimate Stats Framework Component for both **Self** and **Target**.
The node will evaluate the formula using these two components and return the calculated result.
> **Note:** All formulas are automatically created under the `Namespace.Formula` tag path.
