---
id: 619be80062551a080e32c821
title: Step 42
challengeType: 0
dashedName: step-42
---
# --description--
Round off the crest, by giving the pseudo-element bottom corners a radius of `100%`, leaving the top corners at `0%`.
# --hints--
You should use the `border-radius` property to round off the crest.
```js
assert.notEmpty(new __helpers.CSSHelp(document).getStyle('.penguin-body::before')?.borderRadius);
```
You should give `.penguin-body::before` a `border-radius` of `0% 0% 100% 100%`.
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin-body::before')?.borderBottomLeftRadius, '100%');
assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin-body::before')?.borderBottomRightRadius, '100%');
assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin-body::before')?.borderTopLeftRadius, '0%');
assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin-body::before')?.borderTopRightRadius, '0%');
```
# --seed--
## --seed-contents--
```html