diff --git a/MarkdownLivePreview.py b/MarkdownLivePreview.py
index 932f759..848511b 100644
--- a/MarkdownLivePreview.py
+++ b/MarkdownLivePreview.py
@@ -91,6 +91,7 @@ class OpenMarkdownPreviewCommand(sublime_plugin.TextCommand):
         preview_view.set_scratch(True)
         preview_view.settings().set(PREVIEW_VIEW_INFOS, {})
         preview_view.set_name("Preview")
+        # FIXME: hide number lines on preview
 
         preview_window.focus_group(0)
         if file_name:
@@ -224,6 +225,7 @@ class MarkdownLivePreviewListener(sublime_plugin.EventListener):
         html = markdown2html(
             markdown, basepath, partial(self._update_preview, markdown_view), resources,
         )
+        print(html)
 
         self.phantom_sets[markdown_view.id()].update(
             [
diff --git a/live-testing/test.md b/live-testing/test.md
index 8b92215..2185d2b 100644
--- a/live-testing/test.md
+++ b/live-testing/test.md
@@ -1 +1,9 @@
-a_b_c
\ No newline at end of file
+```
+hello world
+```
+
+```
+second part
+```
+
+hello world
\ No newline at end of file
diff --git a/markdown2html.py b/markdown2html.py
index 0cf706b..e9bd6a3 100644
--- a/markdown2html.py
+++ b/markdown2html.py
@@ -136,3 +136,12 @@ def load_image(url):
                 )
             )
         return "data:image/png;base64," + base64.b64encode(conn.read()).decode("utf-8")
+
+
+def independent_markdown2html(markdown):
+    return markdown2html(
+        markdown,
+        ".",
+        lambda: None,
+        {"base64_404_image": "", "base64_loading_image": "", "stylesheet": ""},
+    )
diff --git a/resources/stylesheet.css b/resources/stylesheet.css
index fb94801..e0e736e 100644
--- a/resources/stylesheet.css
+++ b/resources/stylesheet.css
@@ -15,8 +15,9 @@ blockquote {
 }
 
 pre {
-	display: block;
-	background-color: var(--very-light-bg);
+    display: block;
+    background-color: var(--very-light-bg);
+    margin: 10px 0;
 }
 
 code {