Pretty striped background for form errors in the MD theme

boards/static/css/md/base_page.css

@@ -132,6 +132,14 b' p {'
 .form-errors {
     font-weight: bolder;
     vertical-align: middle;
+    padding: 3px;
+    background: repeating-linear-gradient(
+        -45deg,
+        #330,
+        #330 10px,
+        #111 10px,
+        #111 20px
+    );
 }
 
 .post-form input:not([name="image"]), .post-form textarea {