I have created a codepen to showcase my work on the accordion using the selectors covered in this class. I personally found the attribute selectors most useful, as I am currently building an image gallery in a personal project and these will definitely come in handy. 

Here is a code snippet from that section: 

.draw[data-type='T01'] .label {
    background: #E3B23C;
}

.draw img[alt~=bike] {
    transform: rotate(5deg);
}