diff --git a/references/overlay.py b/references/overlay.py
new file mode 100644
index 0000000..542a60c
--- /dev/null
+++ b/references/overlay.py
@@ -0,0 +1,138 @@
+import wx
+# import wx.richtext as rt
+# import images
+# http://www.ccp4.ac.uk/dist/checkout/wxPython-src-3.0.2.0/wxPython/demo/RichTextCtrl.py
+# https://stackoverflow.com/questions/40257359/how-to-dynamically-update-multiple-wxpython-static-text
+
+def GetRoundBitmap( w, h, r ):
+    maskColor = wx.Colour(0,0,0)
+    shownColor = wx.Colour(5,5,5)
+    b = wx.EmptyBitmap(w,h)
+    dc = wx.MemoryDC(b)
+    dc.SetBrush(wx.Brush(maskColor))
+    dc.DrawRectangle(0,0,w,h)
+    dc.SetBrush(wx.Brush(shownColor))
+    dc.SetPen(wx.Pen(shownColor))
+    dc.DrawRoundedRectangle(0,0,w,h,r)
+    dc.SelectObject(wx.NullBitmap)
+    b.SetMaskColour(maskColor)
+    return b
+
+def GetRoundShape( w, h, r ):
+    return wx.Region( GetRoundBitmap(w,h,r) )
+
+class PanelOne(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent)
+        self.Bind(wx.EVT_KEY_UP, self.OnKeyDown)
+        wx.StaticText(self, label = "'^⌘G - Select All    (Ctrl-Cmd-G)        ^⌘G - Select All    (Ctrl-Cmd-G)\n^⌘G - Select All    (Ctrl-Cmd-G)        ^⌘G - Select All    (Ctrl-Cmd-G)")
+        self.SetTransparent( 220 )
+
+    def OnKeyDown(self, event):
+        self.Destroy()
+
+class FancyFrame(wx.Frame):
+    def __init__(self):
+        sizer = wx.GridBagSizer()
+        style = ( wx.CLIP_CHILDREN | wx.STAY_ON_TOP | wx.FRAME_NO_TASKBAR |
+                  wx.NO_BORDER | wx.FRAME_SHAPED  )
+        wx.Frame.__init__(self, None, title='Fancy', style = style)
+
+        # self.rtc = rt.RichTextCtrl(self, style=wx.VSCROLL|wx.TE_READONLY|wx.HSCROLL|wx.NO_BORDER);
+        # self.rtc.Disable()
+        boldstatic = wx.Font(pointSize = 24, family = wx.DEFAULT,
+               style = wx.BOLD, weight = wx.BOLD,
+               faceName = 'Consolas')
+        normalstatic = wx.Font(pointSize = 10, family = wx.DEFAULT,
+               style = wx.NORMAL, weight = wx.NORMAL,
+               faceName = 'Consolas')
+        # font = wx.Font(pointSize = 18, family = wx.DEFAULT,
+        #        style = wx.NORMAL, weight = wx.NORMAL,
+        #        faceName = 'Consolas')
+        self.SetFont(boldstatic)
+        self.SetBackgroundColour((211,211,211))
+        self.label = wx.StaticText(self, label = "^⌘G", pos = (100,50))
+        self.SetFont(normalstatic)
+        self.label2 = wx.StaticText(self, label = " - Select All    (Ctrl-Cmd-G)", pos = (200,50))
+        # sizer.Add(self.label, (4, 0), (1, 5), wx.EXPAND)
+        # sizer.Add(self.label2, (5, 0), (1, 5), wx.EXPAND)
+        # wx.StaticText(self, label = "^⌘G - Select All    (Ctrl-Cmd-G)  ||  ^⌘G - Select All    (Ctrl-Cmd-G)\n^⌘G - Select All    (Ctrl-Cmd-G)        ^⌘G - Select All    (Ctrl-Cmd-G)")
+        # self.rtc.Bind(wx.EVT_SET_FOCUS,self.OnInput)
+        # self.rtc.Bind(wx.EVT_KILL_FOCUS,self.OnInput)
+        # self.rtc.Bind(wx.EVT_KEY_UP, self.OnKeyDown)
+        # self.rtc.BeginFontSize(14)
+        # self.rtc.BeginBold()
+        # self.rtc.WriteText("^⌘G")
+        # self.rtc.EndBold()
+        # self.rtc.BeginFontSize(10)
+        # self.rtc.WriteText(" - Select All    (Ctrl-Cmd-G)\n")
+        # self.rtc.BeginFontSize(14)
+        # self.rtc.WriteText("Different font sizes on the same line is allowed, too.")
+        # self.rtc.EndFontSize()
+
+        # self.rtc.WriteText(" Next we'll show an indented paragraph.")
+
+        # self.rtc.BeginLeftIndent(60)
+        # self.rtc.Newline()
+
+        # self.rtc.WriteText("It was in January, the most down-trodden month of an Edinburgh winter. An attractive woman came into the cafe, which is nothing remarkable.")
+        # self.rtc.EndLeftIndent()
+        # self.SetFont(wx.Font(20, wx.SWISS, wx.NORMAL, wx.BOLD))
+        # font = wx.Font(18, wx.DECORATIVE, wx.ITALIC, wx.NORMAL)
+        # wx.text.SetFont(font)
+        # self.panelOne = PanelOne(self)
+        # self.SetFocus()
+        w, h = wx.GetDisplaySize()
+        self.SetSize((w/2, h/2))
+        self.SetPosition( ((w-w/2)/2,(h-h/2)/2) )
+        self.SetTransparent( 220 )
+
+        self.Bind(wx.EVT_KEY_UP, self.OnKeyDown)
+        self.Bind(wx.EVT_MOTION, self.OnMouse)
+        self.Bind(wx.EVT_PAINT, self.OnPaint)
+        if wx.Platform == '__WXGTK__':
+            self.Bind(wx.EVT_WINDOW_CREATE, self.SetRoundShape)
+        else:
+            self.SetRoundShape()
+
+        self.SetSizer(sizer)
+        self.Show(True)
+
+    
+    def OnInput(self, e):
+        self.Destroy()
+        # e.Skip()
+
+    def SetRoundShape(self, event=None):
+        w, h = self.GetSizeTuple()
+        self.SetShape(GetRoundShape( w,h, 10 ) )
+
+    def OnPaint(self, event):
+        dc = wx.PaintDC(self)
+        dc = wx.GCDC(dc)
+        w, h = self.GetSizeTuple()
+        r = 10
+        dc.SetPen( wx.Pen("#D3D3D3dth = 2"))
+        dc.SetBrush( wx.Brush("#D3D3D3"))
+        dc.DrawRoundedRectangle( 0,0,w,h,r )
+
+    def OnKeyDown(self, event):
+        # self.Close(force=True)
+        self.Destroy()
+
+    def OnMouse(self, event):
+        """implement dragging"""
+        if not event.Dragging():
+            self._dragPos = None
+            return
+        self.CaptureMouse()
+        if not self._dragPos:
+            self._dragPos = event.GetPosition()
+        else:
+            pos = event.GetPosition()
+            displacement = self._dragPos - pos
+            self.SetPosition( self.GetPosition() - displacement )
+
+app = wx.App()
+f = FancyFrame()
+app.MainLoop()
\ No newline at end of file