diff --git a/src/command.cr b/src/command.cr
index f976c25..b4c7e27 100644
--- a/src/command.cr
+++ b/src/command.cr
@@ -11,7 +11,7 @@ class BuildWoodMillCommand < Command
 
   def start(world : World) : Int32
     printf "  << start build mill at [%d:%d]\n", @point.x, @point.y
-    return BASE_TIME
+    BASE_TIME
   end
 
   def finish(world : World)
@@ -37,7 +37,7 @@ class GetWoodCommand < Command
     else
       printf "  << no wood tile\n"
       @wood = 0
-      return BASE_TIME
+      BASE_TIME
     end
   end
 
@@ -49,7 +49,7 @@ class GetWoodCommand < Command
       @point.x, @point.y,
       dist, @wood,
       wood_point.x, wood_point.y
-    return BASE_TIME + 2 * dist
+    BASE_TIME + 2 * dist
   end
 
   def finish(world : World)
@@ -73,7 +73,7 @@ class BuildForesterHouseCommand < Command
 
   def start(world : World) : Int32
     printf "  >> start build forester house at [%d:%d]\n", @point.x, @point.y
-    return BASE_TIME
+    BASE_TIME
   end
 
   def finish(world : World)
@@ -99,9 +99,9 @@ class GrowWoodCommand < Command
     if !@wood_tile.nil?
       calc_time(@wood_tile.as(Tile))
     else
-      printf "no wood tile\n"
+      printf "  >> no wood tile\n"
       @wood = 0
-      return BASE_TIME
+      BASE_TIME
     end
   end
 
@@ -112,12 +112,13 @@ class GrowWoodCommand < Command
       @point.x, @point.y,
       dist,
       wood_point.x, wood_point.y
-    return BASE_TIME + 2 * dist
+    BASE_TIME + 2 * dist
   end
 
   def finish(world : World)
     printf "  >> finish grow wood at [%d,%d]\n", @point.x, @point.y
     if !@wood_tile.nil?
+      printf "  >> finish grow wood for %d\n", BASE_WOOD
       @wood_tile.as(Tile).charge(BASE_WOOD)
     end
     world.push(GrowWoodCommand.new(@point))
@@ -125,7 +126,7 @@ class GrowWoodCommand < Command
 
   private def nearest_wood(world : World)
     world.map.nearest_tile @point do |tile|
-      tile.letter == 'f' && tile.cur < tile.cur
+      tile.letter == 'f' && tile.cur < tile.cap
     end
   end
 end
diff --git a/src/map.cr b/src/map.cr
index 72db453..d2aa21c 100644
--- a/src/map.cr
+++ b/src/map.cr
@@ -37,15 +37,15 @@ abstract class Tile
     if value >= @cur
       wd = @cur
       @cur = 0
-      return wd
+      wd
     else
       @cur -= value
-      return value
+      value
     end
   end
 
   def charge(value)
-    if value + @cur > @cap
+    if (value + @cur) > @cap
       @cur = @cap
     else
       @cur += value
diff --git a/src/village.cr b/src/village.cr
index f5d7684..0c33662 100644
--- a/src/village.cr
+++ b/src/village.cr
@@ -60,7 +60,11 @@ 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(60)
+w.push(BuildWoodMillCommand.new(Point.new(2, 1)))
+w.push(BuildWoodMillCommand.new(Point.new(2, 3)))
+w.push(BuildForesterHouseCommand.new(Point.new(2, 0)))
+w.push(BuildForesterHouseCommand.new(Point.new(1, 2)))
+w.push(BuildForesterHouseCommand.new(Point.new(3, 2)))
+w.run(120)
+w.map.print
 printf "Wood: %d\n", w.resources.wood