--- id: 5d822fd413a79914d39e98db title: Step 19 challengeType: 0 dashedName: step-19 --- # --description-- Give the new buildings `width` and `height` properties of: `10%` and `50%` for `.bb2`, `10%` and `55%` for `.bb3`, and `11%` and `58%` for `.bb4`. You will be using almost all percent based units and some flexbox for this project, so everything will be completely responsive. # --hints-- You should give `.bb2` a `width` of `10%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb2')?.width, '10%'); ``` You should give `.bb2` a `height` of `50%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb2')?.height, '50%'); ``` You should give `.bb3` a `width` of `10%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb3')?.width, '10%'); ``` You should give `.bb3` a `height` of `55%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb3')?.height, '55%'); ``` You should give `.bb4` a `width` of `11%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb4')?.width, '11%'); ``` You should give `.bb4` a `height` of `58%`. ```js assert.equal(new __helpers.CSSHelp(document).getStyle('.bb4')?.height, '58%'); ``` # --seed-- ## --seed-contents-- ```html