---
id: 5d822fd413a79914d39e9918
title: Step 79
challengeType: 0
dashedName: step-79
---
# --description--
You're going to use some more border tricks for the top section. Add a `border-bottom` with a value of `7vh solid var(--building-color4)` to `.fb1a`. This will put a `7vh` height border on the bottom. But since the element has zero size, it only shows up as a 2px wide line from the 1px border that is on all the elements.
# --hints--
You should give `.fb1a` a `border-bottom`.
```js
assert.isNotEmpty(new __helpers.CSSHelp(document).getStyle(".fb1a")?.borderBottom);
```
You should use a `border-bottom` of `7vh solid var(--building-color4)`.
```js
assert.equal(new __helpers.CSSHelp(document).getStyle(".fb1a")?.borderBottom.trim(), "7vh solid var(--building-color4)");
```
# --seed--
## --seed-contents--
```html
    
  
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