In this lesson we create our first custom Gutenberg Blocks with Oxygen. This lesson mentions some custom code which can be downloaded or copied below:
Download Custom CSS here: https://drive.google.com/file/d/1Djbwknu8wx7BhiL_WWBrvaT3hlx84Ova/view?usp=sharing
Or copy and paste:
height: 100%;
width: 100%;
object-fit: cover;