css-doodle
A web component for drawing patterns with CSS
...The syntax of CSS-doodle is based on CSS and provides several extra utility functions and shorthand properties. The number of rows and columns in the grid is defined by the grid attribute on the element, ranging from 1 to 64. Its default is 1x1 when no value or 0 is given. The row or column is limited up to 4096 only when the grid is 1-dimensional.