---
id: 5d68d631e0696bdec46938f0
title: Part 49
challengeType: 0
isHidden: true
---
## Description
Now that the store and cave locations are complete, we'll code the actions at those locations. Inside the `buyHealth` function, set `gold` to equal `gold` minus 10.
For example here is how you would set set `num` to equal 5 less than `num`: `num = num - 5;`.
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
# testString: assert((() => { buyHealth(); return gold === 40; })());
testString: buyHealth(), assert(gold === 40);
```
## Challenge Seed
```html
```
### Before Test
```html
RPG - Dragon Repeller
XP: 0Health: 100Gold: 50
Monster Name: Health:
Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.