diff --git a/draw map.vl b/draw map.vl
index 0caa3d7..c46c678 100644
--- a/draw map.vl	
+++ b/draw map.vl	
@@ -1317,6 +1317,14 @@
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             <Pin Id="N6j9qJyTtlzMhreGEVLQYQ" Name="Output" Kind="StateOutputPin" />
           </Node>
+          <Node Bounds="257,2102,22,19" Id="AkpaJZ9vuARLVyYCmfoUeV">
+            <p:NodeReference LastCategoryFullName="Math" LastSymbolSource="CoreLibBasics.vl">
+              <Choice Kind="NodeFlag" Name="Node" Fixed="true" />
+              <Choice Kind="OperationCallFlag" Name="- (Negate)" />
+            </p:NodeReference>
+            <Pin Id="G1WGsAZg8PrL2dCHhE1BEE" Name="Input" Kind="InputPin" />
+            <Pin Id="D3Durh1dxSeMz11NkNrgkf" Name="Output" Kind="OutputPin" />
+          </Node>
         </Canvas>
         <Patch Id="TuFscrXBYHpLXFXWMfwXVT" Name="Create" />
         <Patch Id="QbEozsjxCWBQOJK28ZrBPb" Name="Update" />
@@ -1444,7 +1452,6 @@
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@@ -1482,6 +1489,8 @@
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         <Link Id="IR7RxcfsGWSMBeii05NFA0" Ids="ItaSdlZ1Xq0PhZUSSdyH1L,K6jVZjnXTcaK9dQ7ZEiagG" />
+        <Link Id="MnlkS3LxtkUOISnlcfjpaD" Ids="RKg1VkxbbzEMYnWcnOLC2o,G1WGsAZg8PrL2dCHhE1BEE" />
+        <Link Id="FgBFcyfHByuPpqmVVVKHs4" Ids="D3Durh1dxSeMz11NkNrgkf,E4Ea5Q5pLOyOXYDlYDLWle" />
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     </Node>
   </Patch>