diff --git a/js/dos/ext/vis/examples/graph3d/playground/prettify/lang-css.js b/js/dos/ext/vis/examples/graph3d/playground/prettify/lang-css.js
new file mode 100644
index 0000000..ca8400e
--- /dev/null
+++ b/js/dos/ext/vis/examples/graph3d/playground/prettify/lang-css.js
@@ -0,0 +1,2 @@
+PR.registerLangHandler(PR.createSimpleLexer([["pln",/^[ \t\r\n\f]+/,null," \t\r\n\u000c"]],[["str",/^\"(?:[^\n\r\f\\\"]|\\(?:\r\n?|\n|\f)|\\[\s\S])*\"/,null],["str",/^\'(?:[^\n\r\f\\\']|\\(?:\r\n?|\n|\f)|\\[\s\S])*\'/,null],["lang-css-str",/^url\(([^\)\"\']*)\)/i],["kwd",/^(?:url|rgb|\!important|@import|@page|@media|@charset|inherit)(?=[^\-\w]|$)/i,null],["lang-css-kw",/^(-?(?:[_a-z]|(?:\\[0-9a-f]+ ?))(?:[_a-z0-9\-]|\\(?:\\[0-9a-f]+ ?))*)\s*:/i],["com",/^\/\*[^*]*\*+(?:[^\/*][^*]*\*+)*\//],
+["com",/^(?:<!--|--\>)/],["lit",/^(?:\d+|\d*\.\d+)(?:%|[a-z]+)?/i],["lit",/^#(?:[0-9a-f]{3}){1,2}/i],["pln",/^-?(?:[_a-z]|(?:\\[\da-f]+ ?))(?:[_a-z\d\-]|\\(?:\\[\da-f]+ ?))*/i],["pun",/^[^\s\w\'\"]+/]]),["css"]);PR.registerLangHandler(PR.createSimpleLexer([],[["kwd",/^-?(?:[_a-z]|(?:\\[\da-f]+ ?))(?:[_a-z\d\-]|\\(?:\\[\da-f]+ ?))*/i]]),["css-kw"]);PR.registerLangHandler(PR.createSimpleLexer([],[["str",/^[^\)\"\']+/]]),["css-str"])
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