Example HTML code for https://github.com/markhowellsmead/helpers/wiki/Gutenberg-Patterns

block-navigation-four-column.html

<!-- wp:group {"align":"full"} --><div class="wp-block-group alignfull"><div class="wp-block-group__inner-container"><!-- wp:columns --><div class="wp-block-columns"><!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":4} --><h4>Menu 1</h4><!-- /wp:heading --><!-- wp:list {"className":"is-style-none"} --><ul class="is-style-none"><li><a href="#">Entry 1</a></li><li><a href="#">Entry 2</a></li><li><a href="#">Entry 3</a></li><li><a href="#">Entry 4</a></li></ul><!-- /wp:list --></div><!-- /wp:column --><!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":4} --><h4>Menu 2</h4><!-- /wp:heading --><!-- wp:list {"className":"is-style-none"} --><ul class="is-style-none"><li><a href="#">Entry 1</a></li><li><a href="#">Entry 2</a></li><li><a href="#">Entry 3</a></li><li><a href="#">Entry 4</a></li></ul><!-- /wp:list --></div><!-- /wp:column --><!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":4} --><h4>Menu 3</h4><!-- /wp:heading --><!-- wp:list {"className":"is-style-none"} --><ul class="is-style-none"><li><a href="#">Entry 1</a></li><li><a href="#">Entry 2</a></li><li><a href="#">Entry 3</a></li><li><a href="#">Entry 4</a></li></ul><!-- /wp:list --></div><!-- /wp:column --><!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":4} --><h4>Menu 4</h4><!-- /wp:heading --><!-- wp:list {"className":"is-style-none"} --><ul class="is-style-none"><li><a href="#">Entry 1</a></li><li><a href="#">Entry 2</a></li><li><a href="#">Entry 3</a></li><li><a href="#">Entry 4</a></li></ul><!-- /wp:list --></div><!-- /wp:column --></div><!-- /wp:columns --></div></div><!-- /wp:group -->