diff --git a/ExpCore/GuiParts/center.lua b/ExpCore/GuiParts/center.lua
index fa58961d..dd650603 100644
--- a/ExpCore/GuiParts/center.lua
+++ b/ExpCore/GuiParts/center.lua
@@ -61,9 +61,11 @@ end
 
 -- this is the default draw function if one is not provided
 function center._center:draw(frame)
+    Gui.bar(frame,520)
     local tab_bar = frame.add{
         type='frame',
-        name='tab_bar'
+        name='tab_bar',
+        direction='vertical'
     }
     local tab_bar_scroll = tab_bar.add{
         type='scroll-pane', 
@@ -76,6 +78,7 @@ function center._center:draw(frame)
         name='tab_bar_scroll_flow', 
         direction='horizontal'
     }
+    Gui.bar(frame,520)
     local tab = frame.add{
         type ='frame',
         name='tab',
@@ -87,6 +90,7 @@ function center._center:draw(frame)
         horizontal_scroll_policy='never',
         vertical_scroll_policy='auto'
     }
+    Gui.bar(frame,520)
     local first_tab = nil
     for name,button in pairs(self.tabs) do
         first_tab = first_tab or name
diff --git a/ExpCore/gui.lua b/ExpCore/gui.lua
index 9314a097..aa961f5b 100644
--- a/ExpCore/gui.lua
+++ b/ExpCore/gui.lua
@@ -25,6 +25,18 @@ function Gui:_load_parts(parts)
     end
 end
 
+function Gui.bar(frame,width)
+    local line = frame.add{
+        type='progressbar',
+        size=1,
+        value=1
+    }
+    line.style.height = 3
+    line.style.width = width or 10
+    line.style.color = defines.color.white
+    return line
+end
+
 Event.register(defines.events.on_tick, function(event)
 	if (event.tick/(3600*game.speed)) % 15 == 0 then
 		Gui.left.update()