diff --git a/AirplaneWithRadar/AirplaneWithRadar/SkyMap.cs b/AirplaneWithRadar/AirplaneWithRadar/SkyMap.cs
index b09abf6..da33fdc 100644
--- a/AirplaneWithRadar/AirplaneWithRadar/SkyMap.cs
+++ b/AirplaneWithRadar/AirplaneWithRadar/SkyMap.cs
@@ -22,7 +22,7 @@ namespace AirplaneWithRadar
 
         protected override void DrawBarrierPart(Graphics g, int i, int j)
         {
-            g.FillEllipse(barrierColor, i * (_size_x - 1), j * (_size_y - 1), 40, 24);
+            g.FillRectangle(barrierColor, i * _size_x, j * _size_y, i * (_size_x + 1), j * (_size_y + 1));
         }
         protected override void DrawRoadPart(Graphics g, int i, int j)
         {
@@ -41,14 +41,31 @@ namespace AirplaneWithRadar
                     _map[i, j] = _freeRoad;
                 }
             }
-            while (counter < 15)
+            while (counter < 10)
             {
                 int x = _random.Next(0, 100);
                 int y = _random.Next(0, 100);
-                if (_map[x, y] == _freeRoad)
+                if (x - 2 >=0 && y + 4 < 100 && x + 2 < 100)
                 {
-                    _map[x, y] = _barrier;
-                    counter++;
+                    if (_map[x, y] == _freeRoad && _map[x + 1, y + 1] == _freeRoad && _map[x - 1, y + 1] == _freeRoad && _map[x, y + 2] == _freeRoad && _map[x, y + 1] == _freeRoad
+                         && _map[x + 2, y + 2] == _freeRoad && _map[x - 2, y + 2] == _freeRoad && _map[x + 1, y + 3] == _freeRoad && _map[x - 1, y + 3] == _freeRoad
+                         && _map[x, y + 3] == _freeRoad && _map[x, y + 4] == _freeRoad && _map[x + 1, y + 2] == _freeRoad && _map[x - 1, y + 2] == _freeRoad)
+                    {
+                        _map[x, y] = _barrier;
+                        _map[x + 1, y + 1] = _barrier;
+                        _map[x - 1, y + 1] = _barrier;
+                        _map[x + 2, y + 2] = _barrier;
+                        _map[x - 2, y + 2] = _barrier;
+                        _map[x, y + 2] = _barrier;
+                        _map[x, y + 1] = _barrier;
+                        _map[x + 1, y + 3] = _barrier;
+                        _map[x - 1, y + 3] = _barrier;
+                        _map[x, y + 3] = _barrier;
+                        _map[x, y + 4] = _barrier;
+                        _map[x + 1, y + 2] = _barrier;
+                        _map[x - 1, y + 2] = _barrier;
+                        counter++;
+                    }
                 }
             }
         }