diff --git a/olcCodeJam2023Entry/VirusAttack.cpp b/olcCodeJam2023Entry/VirusAttack.cpp
index 4efa31e..ffbeec5 100644
--- a/olcCodeJam2023Entry/VirusAttack.cpp
+++ b/olcCodeJam2023Entry/VirusAttack.cpp
@@ -179,6 +179,12 @@ bool VirusAttack::OnUserUpdate(float fElapsedTime){
 	HandlePanAndZoom(fElapsedTime);
 	HandleMinimapClick();
 
+	for(auto&tile:visibleTiles){
+		tile.second-=fElapsedTime;
+	}
+
+	std::erase_if(visibleTiles,[](std::pair<vf2d,float> key){return key.second<=0;});
+
 	for(auto&u:units){
 		Unit*closestUnit=nullptr;
 		float closestDist=999999;
@@ -186,6 +192,13 @@ bool VirusAttack::OnUserUpdate(float fElapsedTime){
 			IdentifyClosestTarget(closestUnit,closestDist,u,u2);
 			CollisionChecking(u,u2);
 		}
+		if(u->IsFriendly()){
+			for(int y=-1;y<2;y++){
+				for(int x=-1;x<2;x++){
+					visibleTiles[u->GetPos()/24/4+vi2d(x,y)]=5;
+				}
+			}
+		}
 		u->AttemptAttack(closestUnit);
 		u->Update(fElapsedTime);
 	}
@@ -199,6 +212,15 @@ bool VirusAttack::OnUserUpdate(float fElapsedTime){
 	}
 
 	DrawSelectionRectangle();
+	for(int y=game.GetTopLeftTile().y/96-1;y<=game.GetBottomRightTile().y/96+1;y++){
+		for(int x=game.GetTopLeftTile().x/96-1;x<=game.GetBottomRightTile().x/96+1;x++){
+			if(visibleTiles.count(vi2d{x,y})==0){
+				if(x>=0&&y>=0&&x<=CONSTANT::WORLD_SIZE.x*CONSTANT::TILE_SIZE.x&&y<=CONSTANT::WORLD_SIZE.y*CONSTANT::TILE_SIZE.y){
+					game.FillRectDecal(vf2d{float(x),float(y)}*96,{96,96},{0,0,0,128});
+				}
+			}
+		}
+	}
 
 	DrawMinimap();
 
diff --git a/olcCodeJam2023Entry/VirusAttack.h b/olcCodeJam2023Entry/VirusAttack.h
index 1c6871f..93a530d 100644
--- a/olcCodeJam2023Entry/VirusAttack.h
+++ b/olcCodeJam2023Entry/VirusAttack.h
@@ -7,6 +7,7 @@ class VirusAttack : public olc::PixelGameEngine
 {
 private:
 	std::vector<std::shared_ptr<Unit>>units;
+	std::map<vi2d,float>visibleTiles;
 
 	Renderable TILE,MINIMAP_HUD,OUTLINE,MINIMAP_OUTLINE;
 
diff --git a/olcCodeJam2023Entry/olcCodeJam2023Entry.vcxproj b/olcCodeJam2023Entry/olcCodeJam2023Entry.vcxproj
index f87db2d..f02d7bc 100644
--- a/olcCodeJam2023Entry/olcCodeJam2023Entry.vcxproj
+++ b/olcCodeJam2023Entry/olcCodeJam2023Entry.vcxproj
@@ -76,7 +76,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp17</LanguageStandard>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -91,7 +91,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp17</LanguageStandard>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -106,7 +106,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp17</LanguageStandard>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -121,7 +121,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp17</LanguageStandard>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>