CSS Caret Animation Tutorial

Feature: CSS caret-animation property - https://chromestatus.com/feature/5082469066604544

caret: <'caret-color'> || <'caret-shape'>

caret-color: <'color'>>

caret-shape: <'shape'>>

caret-color: red; caret-shape: box caret-color: green; caret-shape: box caret-color: red; caret-shape: underscore caret-color: green; caret-shape: underscore