diff --git a/Configuration/GlobalAssemblyInfo.cs b/Configuration/GlobalAssemblyInfo.cs
index de2f2a81b..443cbbdce 100644
--- a/Configuration/GlobalAssemblyInfo.cs
+++ b/Configuration/GlobalAssemblyInfo.cs
@@ -15,7 +15,7 @@ internal static class RevisionClass
 	public const string Major = "3";
 	public const string Minor = "6";
 	public const string Build = "3";
-	public const string Revision = "2552";
+	public const string Revision = "2556";
 
         public const string MainVersion = Major + "." + Minor;
 	public const string FullVersion = Major + "." + Minor + "." + Build + "." + Revision;
diff --git a/Configuration/Version.defs b/Configuration/Version.defs
index 6ae7b119a..0df7c9511 100644
--- a/Configuration/Version.defs
+++ b/Configuration/Version.defs
@@ -1,4 +1,4 @@
 %COREVERSION%=3
-%REVISION%=2552
+%REVISION%=2556
 %MINOR%=6
 %MAJOR%=3
diff --git a/InstallerSamples/StandardUnits/Turtle/Turtle1.pas b/InstallerSamples/StandardUnits/Turtle/Turtle1.pas
new file mode 100644
index 000000000..2d40e8812
--- /dev/null
+++ b/InstallerSamples/StandardUnits/Turtle/Turtle1.pas
@@ -0,0 +1,53 @@
+uses Turtle,GraphWPF;
+
+var 
+  Atom,FStr,XStr,YStr: string;
+  angle,len,x0,y0: real;
+  n: integer;
+
+procedure Init1; // Dragon
+begin
+  (Atom,FStr,XStr,YStr) := ('fx','f','x+yf+','-fx-y');
+  (angle,len,n,x0,y0) := (90,3,15,300,450);
+end;
+
+procedure Init2; // Koch curve
+begin
+  (Atom,FStr,XStr,YStr) := ('F', 'F-F++F-F', '', '');
+  (angle,len,n,x0,y0) := (60,5,7,10,550);
+end;
+
+procedure Init3; // Quadratic Koch Island
+begin
+  (Atom,FStr,XStr,YStr) := ('F+F+F+F', 'F+F-FF+F+F-F', '', '');
+  (angle,len,n,x0,y0) := (90,4,4,250,450);
+end;
+
+procedure Init4; // Gosper hexagonal curve
+begin
+  (Atom,FStr,XStr,YStr) := ('XF', 'F', 'X+YF++YF-FX--FXFX-YF+','-FX+YFYF++YF+FX--FX-Y');
+  (angle,len,n,x0,y0) := (60,4,5,580,56);
+end;
+
+procedure RunStr(s: string; n: integer);
+begin
+  foreach var c in s do
+    case c of
+      '+': Turn(angle);
+      '-': Turn(-angle);
+      'f','F': if n>0 then RunStr(FStr,n-1) else Forw(len);
+      'x','X': if n>0 then RunStr(XStr,n-1);
+      'y','Y': if n>0 then RunStr(YStr,n-1);
+      else Print('error')
+    end;
+end;
+
+begin
+  Init4;
+  ToPoint(x0,y0);
+  SetWidth(0.5);
+  //SetColor(Colors.Red);
+  Down;
+  RunStr(Atom,n);
+  Up;
+end. 
\ No newline at end of file
diff --git a/Localization/DefaultLang.resources b/Localization/DefaultLang.resources
index f50eebaa7..3b61dd5c3 100644
Binary files a/Localization/DefaultLang.resources and b/Localization/DefaultLang.resources differ
diff --git a/Release/pabcversion.txt b/Release/pabcversion.txt
index a5b73e223..ef457c0e7 100644
--- a/Release/pabcversion.txt
+++ b/Release/pabcversion.txt
@@ -1 +1 @@
-3.6.3.2552
+3.6.3.2556
diff --git a/ReleaseGenerators/PascalABCNET_version.nsh b/ReleaseGenerators/PascalABCNET_version.nsh
index 36ef42a60..d929a41b7 100644
--- a/ReleaseGenerators/PascalABCNET_version.nsh
+++ b/ReleaseGenerators/PascalABCNET_version.nsh
@@ -1 +1 @@
-!define VERSION '3.6.3.2552'
+!define VERSION '3.6.3.2556'
diff --git a/ReleaseGenerators/RebuildStandartModules.pas b/ReleaseGenerators/RebuildStandartModules.pas
index 52d5c5b3e..3dacd3073 100644
--- a/ReleaseGenerators/RebuildStandartModules.pas
+++ b/ReleaseGenerators/RebuildStandartModules.pas
@@ -6,7 +6,7 @@
    GraphABCHelper,  
    GraphWPFBase,
    Graph3D,
-   GraphWPF,
+   GraphWPF, Turtle,
    WPFObjects,
    NumLibABC,
    IniFile, PointerTools, PointRect, PT4, PT4MakerNetX, Robot, RobotField,
diff --git a/ReleaseGenerators/sect_Core.nsh b/ReleaseGenerators/sect_Core.nsh
index c85d2b535..a2b6d610f 100644
--- a/ReleaseGenerators/sect_Core.nsh
+++ b/ReleaseGenerators/sect_Core.nsh
@@ -134,6 +134,7 @@
     File ..\bin\Lib\OpenGLABC.pcu
     File ..\bin\Lib\School.pcu
     File ..\bin\Lib\SF.pcu
+    File ..\bin\Lib\Turtle.pcu
 
     File ..\bin\Lib\PABCRtl.dll
     File ..\bin\Lib\HelixToolkit.Wpf.dll
@@ -202,6 +203,7 @@
     ${AddFile} "OpenGLABC.pcu"
     ${AddFile} "School.pcu"
     ${AddFile} "SF.pcu"
+    ${AddFile} "Turtle.pcu"
 
     ${AddFile} "PABCRtl.dll"
     ${AddFile} "HelixToolkit.Wpf.dll"
@@ -281,6 +283,7 @@
     File ..\bin\Lib\OpenGLABC.pas
     File ..\bin\Lib\School.pas
     File ..\bin\Lib\SF.pas
+    File ..\bin\Lib\Turtle.pas
 
 	File ..\bin\Lib\__RedirectIOMode.vb
 	File ..\bin\Lib\VBSystem.vb
@@ -346,6 +349,7 @@
     ${AddFile} "OpenGLABC.pas"
     ${AddFile} "School.pas"
     ${AddFile} "SF.pas"
+    ${AddFile} "Turtle.pas"
 
 	${AddFile} "__RedirectIOMode.vb"
     ${AddFile} "VBSystem.vb"
diff --git a/bin/Lib/Controls.pas b/bin/Lib/Controls.pas
index 28659cf7c..1bacbe659 100644
--- a/bin/Lib/Controls.pas
+++ b/bin/Lib/Controls.pas
@@ -108,7 +108,7 @@ type
     begin
       var tb := new GTextBlock;
       element := tb;
-      element.Margin := new Thickness(0, 0, 0, GlobalHMargin);
+      //element.Margin := new Thickness(0, 0, 0, GlobalHMargin);
       //element.Margin := new Thickness(5,5,5,0);
       tb.FontSize := fontsize;
       Text := Txt;
@@ -346,12 +346,13 @@ protected
     sl.Minimum := min;
     sl.Maximum := max;
     sl.Value := val;
+    sl.Foreground := Brushes.Black;
     ActivePanel.Children.Add(sl);
   end;
   
   procedure ValueChangedP := if ValueChanged <> nil then ValueChanged;
 public 
-  event ValueChanged: procedure;
+  ValueChanged: procedure;
   constructor Create(min, max, val: real);
   begin
     Invoke(CreateP, min, max, val);
diff --git a/bin/Lib/Turtle.pas b/bin/Lib/Turtle.pas
new file mode 100644
index 000000000..e427420d4
--- /dev/null
+++ b/bin/Lib/Turtle.pas
@@ -0,0 +1,49 @@
+/// Исполнитель Черепаха
+unit Turtle;
+
+uses GraphWPF;
+
+var 
+  tp := Window.Center;
+  a: real := 0;
+  dr := False;
+
+/// Поворачивает Черепаху на угол da против часовой стрелки
+procedure Turn(da: real);
+begin
+  a += da;
+end;
+
+/// Продвигает Черепаху вперёд на расстояние r
+procedure Forw(r: real);
+begin
+  tp += r * Vect(Cos(DegToRad(a)),Sin(DegToRad(a)));
+  if dr then 
+    LineTo(tp.X,tp.Y)
+  else MoveTo(tp.X,tp.Y)
+end;
+
+/// Опускает хвост Черепахи
+procedure Down := dr := True;
+
+/// Поднимает хвост Черепахи
+procedure Up := dr := False;
+
+/// Устанавливает ширину линии 
+procedure SetWidth(w: real) := Pen.Width := w;
+
+/// Устанавливает цвет линии 
+procedure SetColor(c: GColor) := Pen.Color := c;
+
+/// Перемещает Черепаху в точку (x,y)
+procedure ToPoint(x,y: real);
+begin
+  tp := Pnt(x,y);
+  MoveTo(tp.X,tp.Y);
+end;
+  
+
+begin
+  pen.RoundCap := True;
+  MoveTo(tp.X,tp.Y) 
+end.
\ No newline at end of file