diff --git a/bg/dynamic_bg/dynamic_bg.gd b/bg/dynamic_bg/dynamic_bg.gd
index d03768c..3764568 100644
--- a/bg/dynamic_bg/dynamic_bg.gd
+++ b/bg/dynamic_bg/dynamic_bg.gd
@@ -1,8 +1,10 @@
 extends Node2D
 
+signal victory_change(v: bool)
 
 const DynamicBgPattern = preload("res://bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.tscn")
 
+var is_victory = false
 
 const WIDTH = 1920 / 4
 const HEIGHT = 1080 / 4
@@ -21,11 +23,17 @@ func spawn(x_offset, y_offset):
 		
 		new_pattern.position = Vector2(pat_x, pat_y)
 		new_pattern.velocity = VELOCITY
+		victory_change.connect(new_pattern._on_victory_change)
+		new_pattern._on_victory_change(is_victory)
 		add_child(new_pattern)
 		
 		pat_x += W_STEP
 		pat_y += H_STEP
 
+func set_victory(v: bool):
+	if is_victory != v:
+		is_victory = v
+		victory_change.emit(v)
 
 func _ready():
 	var x_offset = 0
diff --git a/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd
index 56f6834..6e37fa4 100644
--- a/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd
+++ b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd
@@ -16,3 +16,7 @@ func _process(delta):
 	position += velocity * delta
 	if position.x > 1920 / 4 + 70 or position.y < -70:
 		queue_free()
+
+func _on_victory_change(v: bool):
+	$Word1.set_victory(v)
+	$Word2.set_victory(v)
diff --git a/levels/base_level/base_level.gd b/levels/base_level/base_level.gd
index 1bf00ed..0590d56 100644
--- a/levels/base_level/base_level.gd
+++ b/levels/base_level/base_level.gd
@@ -154,11 +154,13 @@ func stage_clear() -> void:
 
 
 func _on_card_put() -> void:
+	var block_array = []
 	for block : Block in $Blocks.get_children():
 		if not block.occupied:
 			print(block.quest_pos, " is not occupied")
 			return
 		expr[block.quest_pos] = block.occupied_word
+		block_array.append(block)
 		
 	prints("# expr: ", expr)
 	
@@ -182,7 +184,16 @@ func _on_card_put() -> void:
 			for block: Block in $Blocks.get_children():
 				block.call("shake")
 		else:
+			# victory
+			get_tree().current_scene.set_victory(true)
 			stage_clear()
+			print(block_array)
+			for i in range(len(block_array)):
+				if i != 0:
+					if $Calculator.is_smile(expr[i-1]+expr[i]):
+						print(expr[i-1]+expr[i])
+						block_array[i-1].set_victory(true)
+						block_array[i].set_victory(true)
 
 func _input(event: InputEvent):
 	if event is InputEventKey:
@@ -192,6 +203,10 @@ func _input(event: InputEvent):
 			_on_back_button_pressed()
 
 
+func _exit_tree():
+	get_tree().current_scene.set_victory(false)
+
+
 func _on_back_button_pressed():
 	var level_menu = LevelMenu.instantiate()
 	level_menu.init(chap_id, -1)
diff --git a/main.gd b/main.gd
index a83e777..02e8f50 100644
--- a/main.gd
+++ b/main.gd
@@ -10,10 +10,11 @@ func _ready():
 func _process(delta):
 	pass
 
-
 func _on_main_menu_enter_level():
 	$BGMPlayer.play()
 
 
 func _on_bgm_player_finished():
 	$BGMPlayer.play()
+func set_victory(v: bool):
+	$Bg/DynamicBg.set_victory(v)
diff --git a/main.tscn b/main.tscn
index 7d30d68..daebbfc 100644
--- a/main.tscn
+++ b/main.tscn
@@ -1,5 +1,6 @@
 [gd_scene load_steps=5 format=3 uid="uid://c17fbsiogbgo1"]
 
+[ext_resource type="Script" path="res://main.gd" id="1_d0et0"]
 [ext_resource type="PackedScene" uid="uid://c07co5p46apu7" path="res://objects/main_menu/main_menu.tscn" id="1_fk6j6"]
 [ext_resource type="Script" path="res://main.gd" id="1_nb6uf"]
 [ext_resource type="PackedScene" uid="uid://d3geq38s5fjc6" path="res://bg/dynamic_bg/dynamic_bg.tscn" id="2_8k4il"]
diff --git a/objects/block/block.gd b/objects/block/block.gd
index cf08ae3..997abc0 100644
--- a/objects/block/block.gd
+++ b/objects/block/block.gd
@@ -8,6 +8,7 @@ const SHAKE_AMOUNT := 4
 
 var occupied := false
 var occupied_word: String
+var occupied_card: Card
 
 var quest_pos := -1
 var is_shaking := false
@@ -31,6 +32,10 @@ func set_word(e: String) -> void:
 	else:
 		occupied = false
 		occupied_word = "_"
+
+func set_card(c: Card) -> void:
+	occupied_card = c
+	occupied_word = c.get_word()
 	
 func set_block_type(value: String) -> void:
 	if value == "GOLDEN":
@@ -64,3 +69,9 @@ func shake():
 
 func _on_shake_timer_timeout():
 	is_shaking = false
+	
+func set_victory(v: bool):
+	if occupied and occupied_card:
+		occupied_card.set_victory(v)
+	else:
+		$Word.set_victory(v)
diff --git a/objects/card/card.gd b/objects/card/card.gd
index 463a5ab..8bb67e1 100644
--- a/objects/card/card.gd
+++ b/objects/card/card.gd
@@ -32,7 +32,7 @@ func _on_mouse_release():
 			last_occupied_area.occupied = false
 		entered_area.occupied = true
 		last_occupied_area = entered_area
-		entered_area.occupied_word = $Word.get_word()
+		entered_area.set_card(self)
 		emit_signal("put")
 		$SFXPutDown.play()
 		# prints("card", $Word.get_word(), "put at", entered_area.name, "at global_position", global_position, "when origin global_position at", origin_global_position)
@@ -118,3 +118,6 @@ func _on_mouse_entered():
 
 func _on_mouse_exited():
 	$CardBackSprite.animation = "default"
+
+func set_victory(v: bool):
+	$Word.set_victory(v)
diff --git a/objects/credits/credits.gd b/objects/credits/credits.gd
new file mode 100644
index 0000000..b2d9744
--- /dev/null
+++ b/objects/credits/credits.gd
@@ -0,0 +1,7 @@
+extends Label
+
+func _process(_delta):
+	get_tree().current_scene.set_victory(true)
+
+func _exit_tree():
+	get_tree().current_scene.set_victory(false)
diff --git a/objects/credits/credits.tscn b/objects/credits/credits.tscn
index c167d63..6816eae 100644
--- a/objects/credits/credits.tscn
+++ b/objects/credits/credits.tscn
@@ -1,6 +1,7 @@
-[gd_scene load_steps=2 format=3 uid="uid://cdu8yubd7fyvb"]
+[gd_scene load_steps=3 format=3 uid="uid://cdu8yubd7fyvb"]
 
 [ext_resource type="FontFile" uid="uid://1000owdyvwfg" path="res://fonts/unifont-15.1.04.otf" id="1_re7ax"]
+[ext_resource type="Script" path="res://objects/credits/credits.gd" id="2_epjvn"]
 
 [node name="Label" type="Label"]
 custom_minimum_size = Vector2(480, 256)
@@ -20,3 +21,4 @@ ligen131         Tsukimaru
  
 THANKS FOR PLAYING! ;-)"
 horizontal_alignment = 1
+script = ExtResource("2_epjvn")
diff --git a/objects/word/word.gd b/objects/word/word.gd
index c92ac8d..3bf6280 100644
--- a/objects/word/word.gd
+++ b/objects/word/word.gd
@@ -2,6 +2,7 @@ extends AnimatedSprite2D
 
 
 @export var text_id := 1
+@export var is_victory = false
 
 
 const STEP := 30
@@ -28,11 +29,12 @@ func set_text_id(value: int) -> void:
 	
 	assert(value > 0, "text id <= 0")
 	
-	if not sprite_frames.has_animation(str(text_id)):
-		sprite_frames.add_animation(str(text_id))
+	var animation_id = str(text_id) + str(is_victory)
+	if not sprite_frames.has_animation(animation_id):
+		sprite_frames.add_animation(animation_id)
 		for i in range(3):
-			sprite_frames.add_frame(str(text_id), load("res://objects/word/sprites/sprite" + str(i * STEP + text_id) + ".png"))
-	animation = str(text_id)
+			sprite_frames.add_frame(animation_id, load_image(i * STEP + text_id, is_victory))
+	animation = animation_id
 	
 	
 
@@ -55,3 +57,21 @@ func _ready():
 func _process(delta):
 	if animation == "default":
 		set_text_id(text_id)
+		
+func set_victory(v: bool):
+	if v != is_victory:
+		is_victory = v
+		set_text_id(text_id)
+		
+func load_image(h: int, is_victory: bool):
+	var image := load("res://objects/word/sprites/sprite" + str(h) + ".png")
+	if is_victory:
+		var new_texture = image.get_image()
+		for x in range(new_texture.get_width()):
+			for y in range(new_texture.get_height()):
+				var color = new_texture.get_pixel(x, y)
+				if color == Color(0, 0, 0, 1):  # 如果像素是黑色
+					new_texture.set_pixel(x, y, Color(0xf5 / 256.0, 0xdf / 256.0, 0x4d / 256.0, 1))  # 将其改为金黄色
+		return ImageTexture.create_from_image(new_texture)
+		
+	return image