diff --git a/src/map.cr b/src/map.cr
index 4049caa..7d817a9 100644
--- a/src/map.cr
+++ b/src/map.cr
@@ -123,6 +123,24 @@ class Map
     p
   end
 
+  def nearest_any_wood(point : Point) : Point | Nil
+    p = nil
+    d = 99999
+    (0...4).each do |x|
+      (0...4).each do |y|
+        tile = self.get(Point.new(x, y))
+        if tile.letter == 'f'
+          td = Point.new(x, y).distance(point)
+          if td < d
+            d = td
+            p = Point.new(x, y)
+          end
+        end
+      end
+    end
+    p
+  end
+
   def print
     (0...4).each do |x|
       (0...4).each do |y|
diff --git a/src/queue.cr b/src/queue.cr
index 6f8e6f0..4ae64fe 100644
--- a/src/queue.cr
+++ b/src/queue.cr
@@ -5,9 +5,10 @@ class App::CommandQueue
 
   def push(ts : Int32, cmd : Command)
     @data.push({ts: ts, cmd: cmd})
-    @data.sort! do |x|
-      -x.[:ts]
+    @data.sort! do |a, b|
+      b[:ts] <=> a[:ts]
     end
+    # puts @data
   end
 
   def pop(ts : Int32)
diff --git a/src/village.cr b/src/village.cr
index 2e13754..4e75ee3 100644
--- a/src/village.cr
+++ b/src/village.cr
@@ -16,21 +16,23 @@ class Resources
 end
 
 abstract class Command
-  abstract def start(world : World)
+  abstract def start(world : World) : Int32
   abstract def finish(world : World)
 end
 
 class BuildWoodMillCommand < Command
+  BASE_TIME = 30
+
   def initialize(@point : Point)
   end
 
   def start(world : World) : Int32
-    printf "start build mill at [%d:%d]\n", @point.x, @point.y
-    return 30
+    printf "  << start build mill at [%d:%d]\n", @point.x, @point.y
+    return BASE_TIME
   end
 
   def finish(world : World)
-    printf "finish build mill at [%d,%d]\n", @point.x, @point.y
+    printf "  << finish build mill at [%d,%d]\n", @point.x, @point.y
     mill = WoodMillTile.new(@point)
     world.map.set(mill)
     world.push(GetWoodCommand.new(@point))
@@ -51,11 +53,64 @@ class GetWoodCommand < Command
       dist = @point.distance(wood_point)
       tile = world.map.get(wood_point)
       @wood = tile.withdraw(BASE_WOOD)
-      printf "start cut down wood at [%d,%d] -> %d -> %d -> [%d,%d]\n",
+      printf "  << start cut down wood at [%d,%d] -> %d -> %d -> [%d,%d]\n",
         @point.x, @point.y,
         dist, @wood,
         wood_point.x, wood_point.y
       return BASE_TIME + 2 * dist
+    else
+      printf "  << no wood tile\n"
+      @wood = 0
+      return BASE_TIME
+    end
+  end
+
+  def finish(world : World)
+    printf "  << finish cut down wood at [%d,%d]\n", @point.x, @point.y
+    world.resources.add_wood(@wood)
+    world.push(GetWoodCommand.new(@point))
+  end
+end
+
+class BuildForesterHouseCommand < Command
+  BASE_TIME = 50
+
+  def initialize(@point : Point)
+  end
+
+  def start(world : World) : Int32
+    printf "  >> start build forester house at [%d:%d]\n", @point.x, @point.y
+    return BASE_TIME
+  end
+
+  def finish(world : World)
+    printf "  >> finish build forester house at [%d,%d]\n", @point.x, @point.y
+    tile = ForesterHouseTile.new(@point)
+    world.map.set(tile)
+    world.push(GrowWoodCommand.new(@point))
+  end
+end
+
+class GrowWoodCommand < Command
+  BASE_TIME = 15
+  BASE_WOOD = 30
+
+  @wood_point : Point | Nil
+
+  def initialize(@point : Point)
+    @wood_point = nil
+  end
+
+  def start(world : World) : Int32
+    wood_point = world.map.nearest_any_wood(@point)
+    if !wood_point.nil?
+      dist = @point.distance(wood_point)
+      @wood_point = wood_point
+      printf "  >> start grow wood at [%d,%d] -> %d -> [%d,%d]\n",
+        @point.x, @point.y,
+        dist,
+        wood_point.x, wood_point.y
+      return BASE_TIME + 2 * dist
     else
       printf "no wood tile\n"
       @wood = 0
@@ -64,9 +119,12 @@ class GetWoodCommand < Command
   end
 
   def finish(world : World)
-    printf "finish cut down wood at [%d,%d]\n", @point.x, @point.y
-    world.resources.add_wood(@wood)
-    world.push(GetWoodCommand.new(@point))
+    printf "  >> finish grow wood at [%d,%d]\n", @point.x, @point.y
+    if !@wood_point.nil?
+      tile = world.map.get(@wood_point.as(Point))
+      tile.charge(BASE_WOOD)
+    end
+    world.push(GrowWoodCommand.new(@point))
   end
 end
 
@@ -93,7 +151,7 @@ class World
   def push(command : Command)
     dur = command.start(self)
     done_at = @ts + dur
-    printf "world:plan `%s` at %d\n", typeof(command), done_at
+    printf "world : %d : plan `%s` at %d\n", @ts, typeof(command), done_at
     @queue.push(done_at, command)
   end
 
@@ -105,7 +163,7 @@ class World
       end
       cmd_ts, cmd = item[:ts], item[:cmd]
       @ts = cmd_ts
-      printf "world:finish `%s` at %d\n", typeof(cmd), cmd_ts
+      printf "world : %d : finish `%s`\n", @ts, typeof(cmd)
       cmd.finish(self)
     end
   end
@@ -114,5 +172,6 @@ end
 w = World.new
 w.map.print
 w.push(BuildWoodMillCommand.new(Point.new(0, 0)))
+w.push(BuildForesterHouseCommand.new(Point.new(0, 0)))
 w.run(120)
 printf "Wood: %d\n", w.resources.wood