diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..a6dc9ea
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,302 @@
+import sys
+import time
+import random
+import pygame
+from config import *
+
+
+'''拼图精灵类'''
+class gemSprite(pygame.sprite.Sprite):
+	def __init__(self, img_path, size, position, downlen, **kwargs):
+		pygame.sprite.Sprite.__init__(self)
+		self.image = pygame.image.load(img_path)
+		self.image = pygame.transform.smoothscale(self.image, size)
+		self.rect = self.image.get_rect()
+		self.rect.left, self.rect.top = position
+		self.downlen = downlen
+		self.target_x = position[0]
+		self.target_y = position[1] + downlen
+		self.type = img_path.split('/')[-1].split('.')[0]
+		self.fixed = False
+		self.speed_x = 10
+		self.speed_y = 10
+		self.direction = 'down'
+	'''拼图块移动'''
+	def move(self):
+		if self.direction == 'down':
+			self.rect.top = min(self.target_y, self.rect.top+self.speed_y)
+			if self.target_y == self.rect.top:
+				self.fixed = True
+		elif self.direction == 'up':
+			self.rect.top = max(self.target_y, self.rect.top-self.speed_y)
+			if self.target_y == self.rect.top:
+				self.fixed = True
+		elif self.direction == 'left':
+			self.rect.left = max(self.target_x, self.rect.left-self.speed_x)
+			if self.target_x == self.rect.left:
+				self.fixed = True
+		elif self.direction == 'right':
+			self.rect.left = min(self.target_x, self.rect.left+self.speed_x)
+			if self.target_x == self.rect.left:
+				self.fixed = True
+	'''获取坐标'''
+	def getPosition(self):
+		return self.rect.left, self.rect.top
+	'''设置坐标'''
+	def setPosition(self, position):
+		self.rect.left, self.rect.top = position
+
+
+'''游戏类'''
+class gemGame():
+	def __init__(self, screen, sounds, font, gem_imgs, **kwargs):
+
+		self.screen = screen
+		self.sounds = sounds
+		self.font = font
+		self.gem_imgs = gem_imgs
+		self.reset()
+	'''开始游戏'''
+	def start(self):
+		clock = pygame.time.Clock()
+		# 遍历整个游戏界面更新位置
+		overall_moving = True
+		# 指定某些对象个体更新位置
+		individual_moving = False
+		# 定义一些必要的变量
+		gem_selected_xy = None
+		gem_selected_xy2 = None
+		swap_again = False
+		add_score = 0
+		add_score_showtimes = 10
+		time_pre = int(time.time())
+		# 游戏主循环
+		while True:
+			for event in pygame.event.get():
+				if event.type == pygame.QUIT or (event.type == pygame.KEYUP and event.key == pygame.K_ESCAPE):
+					pygame.quit()
+					sys.exit()
+				elif event.type == pygame.MOUSEBUTTONUP:
+					if (not overall_moving) and (not individual_moving) and (not add_score):
+						position = pygame.mouse.get_pos()
+						if gem_selected_xy is None:
+							gem_selected_xy = self.checkSelected(position)
+						else:
+							gem_selected_xy2 = self.checkSelected(position)
+							if gem_selected_xy2:
+								if self.swapGem(gem_selected_xy, gem_selected_xy2):
+									individual_moving = True
+									swap_again = False
+								else:
+									gem_selected_xy = None
+			if overall_moving:
+				overall_moving = not self.dropGems(0, 0)
+				# 移动一次可能可以拼出多个3连块
+				if not overall_moving:
+					res_match = self.isMatch()
+					add_score = self.removeMatched(res_match)
+					if add_score > 0:
+						overall_moving = True
+			if individual_moving:
+				gem1 = self.getGemByPos(*gem_selected_xy)
+				gem2 = self.getGemByPos(*gem_selected_xy2)
+				gem1.move()
+				gem2.move()
+				if gem1.fixed and gem2.fixed:
+					res_match = self.isMatch()
+					if res_match[0] == 0 and not swap_again:
+						swap_again = True
+						self.swapGem(gem_selected_xy, gem_selected_xy2)
+						self.sounds['mismatch'].play()
+					else:
+						add_score = self.removeMatched(res_match)
+						overall_moving = True
+						individual_moving = False
+						gem_selected_xy = None
+						gem_selected_xy2 = None
+			self.screen.fill((135, 206, 235))
+			self.drawGrids()
+			self.gems_group.draw(self.screen)
+			if gem_selected_xy:
+				self.drawBlock(self.getGemByPos(*gem_selected_xy).rect)
+			if add_score:
+				if add_score_showtimes == 10:
+					random.choice(self.sounds['match']).play()
+				self.drawAddScore(add_score)
+				add_score_showtimes -= 1
+				if add_score_showtimes < 1:
+					add_score_showtimes = 10
+					add_score = 0
+			self.remaining_time -= (int(time.time()) - time_pre)
+			time_pre = int(time.time())
+			self.showRemainingTime()
+			self.drawScore()
+			if self.remaining_time <= 0:
+				return self.score
+			pygame.display.update()
+			clock.tick(FPS)
+	'''初始化'''
+	def reset(self):
+		# 随机生成各个块(即初始化游戏地图各个元素)
+		while True:
+			self.all_gems = []
+			self.gems_group = pygame.sprite.Group()
+			for x in range(NUMGRID):
+				self.all_gems.append([])
+				for y in range(NUMGRID):
+					gem = gemSprite(img_path=random.choice(self.gem_imgs), size=(GRIDSIZE, GRIDSIZE), position=[XMARGIN+x*GRIDSIZE, YMARGIN+y*GRIDSIZE-NUMGRID*GRIDSIZE], downlen=NUMGRID*GRIDSIZE)
+					self.all_gems[x].append(gem)
+					self.gems_group.add(gem)
+			if self.isMatch()[0] == 0:
+				break
+		# 得分
+		self.score = 0
+		# 拼出一个的奖励
+		self.reward = 10
+		# 时间
+		self.remaining_time = 300
+	'''显示剩余时间'''
+	def showRemainingTime(self):
+		remaining_time_render = self.font.render('CountDown: %ss' % str(self.remaining_time), 1, (85, 65, 0))
+		rect = remaining_time_render.get_rect()
+		rect.left, rect.top = (WIDTH-201, 6)
+		self.screen.blit(remaining_time_render, rect)
+	'''显示得分'''
+	def drawScore(self):
+		score_render = self.font.render('SCORE:'+str(self.score), 1, (85, 65, 0))
+		rect = score_render.get_rect()
+		rect.left, rect.top = (10, 6)
+		self.screen.blit(score_render, rect)
+	'''显示加分'''
+	def drawAddScore(self, add_score):
+		score_render = self.font.render('+'+str(add_score), 1, (255, 100, 100))
+		rect = score_render.get_rect()
+		rect.left, rect.top = (250, 250)
+		self.screen.blit(score_render, rect)
+	'''生成新的拼图块'''
+	def generateNewGems(self, res_match):
+		if res_match[0] == 1:
+			start = res_match[2]
+			while start > -2:
+				for each in [res_match[1], res_match[1]+1, res_match[1]+2]:
+					gem = self.getGemByPos(*[each, start])
+					if start == res_match[2]:
+						self.gems_group.remove(gem)
+						self.all_gems[each][start] = None
+					elif start >= 0:
+						gem.target_y += GRIDSIZE
+						gem.fixed = False
+						gem.direction = 'down'
+						self.all_gems[each][start+1] = gem
+					else:
+						gem = gemSprite(img_path=random.choice(self.gem_imgs), size=(GRIDSIZE, GRIDSIZE), position=[XMARGIN+each*GRIDSIZE, YMARGIN-GRIDSIZE], downlen=GRIDSIZE)
+						self.gems_group.add(gem)
+						self.all_gems[each][start+1] = gem
+				start -= 1
+		elif res_match[0] == 2:
+			start = res_match[2]
+			while start > -4:
+				if start == res_match[2]:
+					for each in range(0, 3):
+						gem = self.getGemByPos(*[res_match[1], start+each])
+						self.gems_group.remove(gem)
+						self.all_gems[res_match[1]][start+each] = None
+				elif start >= 0:
+					gem = self.getGemByPos(*[res_match[1], start])
+					gem.target_y += GRIDSIZE * 3
+					gem.fixed = False
+					gem.direction = 'down'
+					self.all_gems[res_match[1]][start+3] = gem
+				else:
+					gem = gemSprite(img_path=random.choice(self.gem_imgs), size=(GRIDSIZE, GRIDSIZE), position=[XMARGIN+res_match[1]*GRIDSIZE, YMARGIN+start*GRIDSIZE], downlen=GRIDSIZE*3)
+					self.gems_group.add(gem)
+					self.all_gems[res_match[1]][start+3] = gem
+				start -= 1
+	'''移除匹配的gem'''
+	def removeMatched(self, res_match):
+		if res_match[0] > 0:
+			self.generateNewGems(res_match)
+			self.score += self.reward
+			return self.reward
+		return 0
+	'''游戏界面的网格绘制'''
+	def drawGrids(self):
+		for x in range(NUMGRID):
+			for y in range(NUMGRID):
+				rect = pygame.Rect((XMARGIN+x*GRIDSIZE, YMARGIN+y*GRIDSIZE, GRIDSIZE, GRIDSIZE))
+				self.drawBlock(rect, color=(0, 0, 255), size=1)
+	'''画矩形block框'''
+	def drawBlock(self, block, color=(255, 0, 255), size=4):
+		pygame.draw.rect(self.screen, color, block, size)
+	'''下落特效'''
+	def dropGems(self, x, y):
+		if not self.getGemByPos(x, y).fixed:
+			self.getGemByPos(x, y).move()
+		if x < NUMGRID-1:
+			x += 1
+			return self.dropGems(x, y)
+		elif y < NUMGRID-1:
+			x = 0
+			y += 1
+			return self.dropGems(x, y)
+		else:
+			return self.isFull()
+	'''是否每个位置都有拼图块了'''
+	def isFull(self):
+		for x in range(NUMGRID):
+			for y in range(NUMGRID):
+				if not self.getGemByPos(x, y).fixed:
+					return False
+		return True
+	'''检查有无拼图块被选中'''
+	def checkSelected(self, position):
+		for x in range(NUMGRID):
+			for y in range(NUMGRID):
+				if self.getGemByPos(x, y).rect.collidepoint(*position):
+					return [x, y]
+		return None
+	'''是否有连续一样的三个块(无--返回0/水平--返回1/竖直--返回2)'''
+	def isMatch(self):
+		for x in range(NUMGRID):
+			for y in range(NUMGRID):
+				if x + 2 < NUMGRID:
+					if self.getGemByPos(x, y).type == self.getGemByPos(x+1, y).type == self.getGemByPos(x+2, y).type:
+						return [1, x, y]
+				if y + 2 < NUMGRID:
+					if self.getGemByPos(x, y).type == self.getGemByPos(x, y+1).type == self.getGemByPos(x, y+2).type:
+						return [2, x, y]
+		return [0, x, y]
+	'''根据坐标获取对应位置的拼图对象'''
+	def getGemByPos(self, x, y):
+		return self.all_gems[x][y]
+	'''交换拼图'''
+	def swapGem(self, gem1_pos, gem2_pos):
+		margin = gem1_pos[0] - gem2_pos[0] + gem1_pos[1] - gem2_pos[1]
+		if abs(margin) != 1:
+			return False
+		gem1 = self.getGemByPos(*gem1_pos)
+		gem2 = self.getGemByPos(*gem2_pos)
+		if gem1_pos[0] - gem2_pos[0] == 1:
+			gem1.direction = 'left'
+			gem2.direction = 'right'
+		elif gem1_pos[0] - gem2_pos[0] == -1:
+			gem2.direction = 'left'
+			gem1.direction = 'right'
+		elif gem1_pos[1] - gem2_pos[1] == 1:
+			gem1.direction = 'up'
+			gem2.direction = 'down'
+		elif gem1_pos[1] - gem2_pos[1] == -1:
+			gem2.direction = 'up'
+			gem1.direction = 'down'
+		gem1.target_x = gem2.rect.left
+		gem1.target_y = gem2.rect.top
+		gem1.fixed = False
+		gem2.target_x = gem1.rect.left
+		gem2.target_y = gem1.rect.top
+		gem2.fixed = False
+		self.all_gems[gem2_pos[0]][gem2_pos[1]] = gem1
+		self.all_gems[gem1_pos[0]][gem1_pos[1]] = gem2
+		return True
+	'''info'''
+	def __repr__(self):
+		return self.info