diff --git a/Airbus/Airbus/DrawingAirplane.cs b/Airbus/Airbus/DrawingAirplane.cs
index 481ba45..71af918 100644
--- a/Airbus/Airbus/DrawingAirplane.cs
+++ b/Airbus/Airbus/DrawingAirplane.cs
@@ -97,7 +97,7 @@ namespace Airbus
             g.DrawEllipse(new(Color.Black, 2), _startPosX + _airplaneWidth - 30, _startPosY + _airplaneHeight + 25, 4, 4);
             g.DrawEllipse(new(Color.Black, 2), _startPosX + _airplaneWidth - 35, _startPosY + _airplaneHeight + 25, 4, 4);
             g.DrawEllipse(new(Color.Black, 2), _startPosX , _startPosY + _airplaneHeight + 25, 4, 4);
-            porthole.DrawPorthole(g, Color.Red, _startPosX, _startPosY);
+            porthole.DrawPortholes(g, Color.Red, _startPosX, _startPosY);
         }
         public void Upd_count_Porthole(CountPorthole count)
         {
diff --git a/Airbus/Airbus/DrawningPorthole.cs b/Airbus/Airbus/DrawningPorthole.cs
index 30b5273..75fff1c 100644
--- a/Airbus/Airbus/DrawningPorthole.cs
+++ b/Airbus/Airbus/DrawningPorthole.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Airbus
 {
-    internal class DrawningPorthole
+    internal class DrawningPorthole : IPorthole
     {
         private CountPorthole _countpornhole;
         public int CountPorthole
@@ -18,15 +18,20 @@ namespace Airbus
             }
 
         }
-        public void DrawPorthole(Graphics g, Color color, float posX, float posY)
+        public void DrawPortholes(Graphics g, Color color, float posX, float posY)
         {
             
             for (int i = 0; i < (int)CountPorthole / 2; i++)
             {
-                g.DrawEllipse(new(color, 2), posX + 125 - i * 7, posY + 30, 5, 5);
-                g.DrawEllipse(new(color, 2), posX + 125 - i * 7, posY + 40, 5, 5);
+                DrawPorthole(g, color, posX + 125 - i * 7, posY + 30);
+                DrawPorthole(g, color, posX + 125 - i * 7, posY + 40);
             }
             
         }
+        public virtual void DrawPorthole(Graphics g, Color color, float posX, float posY)
+        {
+            g.DrawEllipse(new(color, 2), posX, posY, 5, 5);
+
+        }
     }
 }
diff --git a/Airbus/Airbus/IPorthole.cs b/Airbus/Airbus/IPorthole.cs
new file mode 100644
index 0000000..fda8628
--- /dev/null
+++ b/Airbus/Airbus/IPorthole.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Airbus
+{
+    internal interface IPorthole
+    {
+        int CountPorthole { get; set; }
+
+        public void DrawPorthole(Graphics g, Color color, float posX, float posY);
+    }
+}