プログラミング初心者です。Pythonについて知りたいです。

落ちものパズルゲームを作っているのですがBGMを入れたい場合はどうすればいいのでしょうか？

該当のソースコード

Python
1import tkinter
2import random
3
4index = 0
5timer = 0
6score = 0
7hisc = 1000
8difficulty = 0
9tsugi = 0
10
11cursor_x = 0
12cursor_y = 0
13mouse_x = 0
14mouse_y = 0
15mouse_c = 0
16
17def mouse_move(e):
18    global mouse_x, mouse_y
19    mouse_x = e.x
20    mouse_y = e.y
21
22def mouse_press(e):
23    global mouse_c
24    mouse_c = 1
25
26sakana = []
27check = []
28for i in range(10):
29    sakana.append([0, 0, 0, 0, 0, 0, 0, 0])
30    check.append([0, 0, 0, 0, 0, 0, 0, 0])
31
32def draw_sakana():
33    cvs.delete("sakana")
34    for y in range(10):
35        for x in range(8):
36            if sakana[y][x] > 0:
37                cvs.create_image(x*72+60, y*72+60, image=img_sakana[sakana[y][x]], tag="sakana")
38
39def check_sakana():
40    for y in range(10):
41        for x in range(8):
42            check[y][x] = sakana[y][x]
43
44    for y in range(1, 9):
45        for x in range(8):
46            if check[y][x] > 0:
47                if check[y-1][x] == check[y][x] and check[y+1][x] == check[y][x]:
48                    sakana[y-1][x] = 7
49                    sakana[y][x] = 7
50                    sakana[y+1][x] = 7
51
52    for y in range(10):
53        for x in range(1, 7):
54            if check[y][x] > 0:
55                if check[y][x-1] == check[y][x] and check[y][x+1] == check[y][x]:
56                    sakana[y][x-1] = 7
57                    sakana[y][x] = 7
58                    sakana[y][x+1] = 7
59
60    for y in range(1, 9):
61        for x in range(1, 7):
62            if check[y][x] > 0:
63                if check[y-1][x-1] == check[y][x] and check[y+1][x+1] == check[y][x]:
64                    sakana[y-1][x-1] = 7
65                    sakana[y][x] = 7
66                    sakana[y+1][x+1] = 7
67                if check[y+1][x-1] == check[y][x] and check[y-1][x+1] == check[y][x]:
68                    sakana[y+1][x-1] = 7
69                    sakana[y][x] = 7
70                    sakana[y-1][x+1] = 7
71
72def sweep_sakana():
73    num = 0
74    for y in range(10):
75        for x in range(8):
76            if sakana[y][x] == 7:
77                sakana[y][x] = 0
78                num = num + 1
79    return num
80
81def drop_sakana():
82    flg = False
83    for y in range(8, -1, -1):
84        for x in range(8):
85            if sakana[y][x] != 0 and sakana[y+1][x] == 0:
86                sakana[y+1][x] = sakana[y][x]
87                sakana[y][x] = 0
88                flg = True
89    return flg
90
91def over_sakana():
92    for x in range(8):
93        if sakana[0][x] > 0:
94            return True
95    return False
96
97def set_sakana():
98    for x in range(8):
99        sakana[0][x] = random.randint(0, difficulty)
100
101def draw_txt(txt, x, y, siz, col, tg):
102    fnt = ("Times New Roman", siz, "bold")
103    cvs.create_text(x+2, y+2, text=txt, fill="black", font=fnt, tag=tg)
104    cvs.create_text(x, y, text=txt, fill=col, font=fnt, tag=tg)
105
106def game_main():
107    global index, timer, score, hisc, difficulty, tsugi
108    global cursor_x, cursor_y, mouse_c
109    if index == 0: # タイトルロゴ
110        draw_txt("さかな君", 312, 240, 100, "royalblue", "TITLE")
111        cvs.create_rectangle(168, 384, 456, 456, fill="skyblue", width=0, tag="TITLE")
112        draw_txt("Easy", 312, 420, 40, "white", "TITLE")
113        cvs.create_rectangle(168, 528, 456, 600, fill="lightgreen", width=0, tag="TITLE")
114        draw_txt("Normal", 312, 564, 40, "white", "TITLE")
115        cvs.create_rectangle(168, 672, 456, 744, fill="orange", width=0, tag="TITLE")
116        draw_txt("Hard", 312, 708, 40, "white", "TITLE")
117        index = 1
118        mouse_c = 0
119    elif index == 1: # タイトル画面 スタート待ち
120        difficulty = 0
121        if mouse_c == 1:
122            if 168 < mouse_x and mouse_x < 456 and 384 < mouse_y and mouse_y < 456:
123                difficulty = 4
124            if 168 < mouse_x and mouse_x < 456 and 528 < mouse_y and mouse_y < 600:
125                difficulty = 5
126            if 168 < mouse_x and mouse_x < 456 and 672 < mouse_y and mouse_y < 744:
127                difficulty = 6
128        if difficulty > 0:
129            for y in range(10):
130                for x in range(8):
131                    sakana[y][x] = 0
132            mouse_c = 0
133            score = 0
134            tsugi = 0
135            cursor_x = 0
136            cursor_y = 0
137            set_sakana()
138            draw_sakana()
139            cvs.delete("TITLE")
140            index = 2
141    elif index == 2: # 落下
142        if drop_sakana() == False:
143            index = 3
144        draw_sakana()
145    elif index == 3: # 揃ったか
146        check_sakana()
147        draw_sakana()
148        index = 4
149    elif index == 4: # 揃ったネコがあれば消す
150        sc = sweep_sakana()
151        score = score + sc*difficulty*2
152        if score > hisc:
153            hisc = score
154        if sc > 0:
155            index = 2
156        else:
157            if over_sakana() == False:
158                tsugi = random.randint(1, difficulty)
159                index = 5
160            else:
161                index = 6
162                timer = 0
163        draw_sakana()
164    elif index == 5: # マウス入力を待つ
165        if 24 <= mouse_x and mouse_x < 24+72*8 and 24 <= mouse_y and mouse_y < 24+72*10:
166            cursor_x = int((mouse_x-24)/72)
167            cursor_y = int((mouse_y-24)/72)
168            if mouse_c == 1:
169                mouse_c = 0
170                set_sakana()
171                sakana[cursor_y][cursor_x] = tsugi
172                tsugi = 0
173                index = 2
174        cvs.delete("CURSOR")
175        cvs.create_image(cursor_x*72+60, cursor_y*72+60, image=cursor, tag="CURSOR")
176        draw_sakana()
177    elif index == 6: # ゲームオーバー
178        timer = timer + 1
179        if timer == 1:
180            draw_txt("GAME OVER", 312, 348, 60, "red", "OVER")
181        if timer == 50:
182            cvs.delete("OVER")
183            index = 0
184    cvs.delete("INFO")
185    draw_txt("SCORE "+str(score), 160, 60, 32, "blue", "INFO")
186    draw_txt("HISC "+str(hisc), 450, 60, 32, "yellow", "INFO")
187    if tsugi > 0:
188        cvs.create_image(752, 128, image=img_sakana[tsugi], tag="INFO")
189    root.after(100, game_main)
190
191root = tkinter.Tk()
192root.title("落ち物パズル「さかな君」")
193root.resizable(False, False)
194root.bind("<Motion>", mouse_move)
195root.bind("<ButtonPress>", mouse_press)
196cvs = tkinter.Canvas(root, width=912, height=768)
197cvs.pack()
198
199bg = tkinter.PhotoImage(file="sakana_bg.png")
200cursor = tkinter.PhotoImage(file="sakana_cursor.png")
201img_sakana = [
202    None,
203    tkinter.PhotoImage(file="sakana1.png"),
204    tkinter.PhotoImage(file="sakana2.png"),
205    tkinter.PhotoImage(file="sakana3.png"),
206    tkinter.PhotoImage(file="sakana4.png"),
207    tkinter.PhotoImage(file="sakana5.png"),
208    tkinter.PhotoImage(file="sakana6.png"),
209    tkinter.PhotoImage(file="sakana_niku.png")
210]
211
212cvs.create_image(456, 384, image=bg)
213game_main()
214root.mainloop()
215