git clone https://github.com/carlosq09/flex-demo-skylab-houses.git
its a guide of flex with a simple demo with little houses that you can create, use the examples with the listed classes and practice your flex skills!
open in the browser the index.html
Create new houses by duplicating the empty house
and inside of the .house-structure
class you can use .house-window
for windows and .house-door
for doors
Also in the bottom of the exercise you have a simple but very visual guide of flex instructions
<div class="house">
<div class="house-roof"></div>
<div class="house-structure twoWindows">
<div class="house-window"></div>
<div class="house-door"></div>
<div class="house-window"></div>
</div>
</div>