feat: Turtle.BoxFractal ( Fixes #37 )

Author: StartAutomating

Turtle.types.ps1xml

@@ -15,6 +15,26 @@
           </PropertySet>
         </Members>
       </MemberSet>
+      <ScriptMethod>
+        <Name>BoxFractal</Name>
+        <Script>
+                        
+param(
+    [double]$Size = 20,
+    [int]$Order = 4,
+    [double]$Angle = 90
+)
+return $this.L('F-F-F-F',  [Ordered]@{
+    F = 'F-F+F+F-F'
+}, $Order, [Ordered]@{
+    '\+'    = { $this.Rotate($Angle) }
+    '-'     = { $this.Rotate($Angle * -1) }
+    'F'     = { $this.Forward($Size) }
+})
+
+
+                    </Script>
+      </ScriptMethod>
       <ScriptMethod>
         <Name>Clear</Name>
         <Script>