diff --git a/scenes/pribor-externals/externals.gd b/scenes/pribor-externals/externals.gd
index 4e525d4..ad8ff89 100644
--- a/scenes/pribor-externals/externals.gd
+++ b/scenes/pribor-externals/externals.gd
@@ -7,10 +7,11 @@ func _ready() -> void:
     if Engine.is_editor_hint():
         return
     for unit_inst in network.units.values():
-        var unit_panel = UnitPanel.instantiate()
+        var unit_panel = UnitPanel.instantiate() as Control
         unit_panel.fname = unit_inst.name
         $grid.add_child(unit_panel)
+        unit_inst.connect('line_changed', on_line_changed.bind(unit_panel))
 
 
-func on_line_changed(unit_inst):
-    pass
+func on_line_changed(unit_inst: unit.Unit, unit_panel):
+    unit_panel.state = unit_inst.online