1+ import turtle
2+ import time
3+ import random
4+ 5+ delay = 0.1
6+ 7+ # Score
8+ score = 0
9+ high_score = 0
10+ 11+ # Setting up the screen
12+ wn = turtle .Screen ()
13+ wn .title ("Snake Game in Python" )
14+ wn .bgcolor ("black" )
15+ wn .setup (width = 600 , height = 600 )
16+ wn .tracer (0 ) # Turns off the screen updates
17+ 18+ # Snake head
19+ head = turtle .Turtle ()
20+ head .speed (0 )
21+ head .shape ("square" )
22+ head .color ("red" )
23+ head .penup ()
24+ head .goto (0 , 0 )
25+ head .direction = "stop"
26+ 27+ # Snake food
28+ food = turtle .Turtle ()
29+ food .speed (0 )
30+ food .shape ("circle" )
31+ food .color ("green" )
32+ food .penup ()
33+ food .goto (0 , 100 )
34+ 35+ segments = []
36+ 37+ # Pen
38+ pen = turtle .Turtle ()
39+ pen .speed (0 )
40+ pen .shape ("square" )
41+ pen .color ("white" )
42+ pen .penup ()
43+ pen .hideturtle ()
44+ pen .goto (0 , 260 )
45+ pen .write ("Score: 0 High Score: 0" , align = "center" , font = ("Verdana" , 24 , "normal" ))
46+ 47+ 48+ # Functions
49+ def go_up ():
50+ if head .direction != "down" :
51+ head .direction = "up"
52+ 53+ 54+ def go_down ():
55+ if head .direction != "up" :
56+ head .direction = "down"
57+ 58+ 59+ def go_left ():
60+ if head .direction != "right" :
61+ head .direction = "left"
62+ 63+ 64+ def go_right ():
65+ if head .direction != "left" :
66+ head .direction = "right"
67+ 68+ 69+ def move ():
70+ if head .direction == "up" :
71+ y = head .ycor ()
72+ head .sety (y + 20 )
73+ 74+ if head .direction == "down" :
75+ y = head .ycor ()
76+ head .sety (y - 20 )
77+ 78+ if head .direction == "left" :
79+ x = head .xcor ()
80+ head .setx (x - 20 )
81+ 82+ if head .direction == "right" :
83+ x = head .xcor ()
84+ head .setx (x + 20 )
85+ 86+ 87+ # Keyboard bindings
88+ wn .listen ()
89+ wn .onkeypress (go_up , "w" )
90+ wn .onkeypress (go_down , "s" )
91+ wn .onkeypress (go_left , "a" )
92+ wn .onkeypress (go_right , "d" )
93+ 94+ # Main game loop
95+ while True :
96+ wn .update ()
97+ 98+ # Check for a collision with the border
99+ if head .xcor () > 290 or head .xcor () < - 290 or head .ycor () > 290 or head .ycor () < - 290 :
100+ time .sleep (1 )
101+ head .goto (0 , 0 )
102+ head .direction = "stop"
103+ 104+ # Hide the segments
105+ for segment in segments :
106+ segment .goto (1000 , 1000 )
107+ 108+ # Clear the segments list
109+ segments .clear ()
110+ 111+ # Reset the score
112+ score = 0
113+ 114+ # Reset the delay
115+ delay = 0.1
116+ 117+ pen .clear ()
118+ pen .write ("Score: {} High Score: {}" .format (score , high_score ), align = "center" , font = ("Verdana" , 24 , "normal" ))
119+ 120+ # Check for a collision with the food
121+ if head .distance (food ) < 20 :
122+ # Move the food to a random spot
123+ x = random .randint (- 290 , 290 )
124+ y = random .randint (- 290 , 290 )
125+ food .goto (x , y )
126+ 127+ # Add a segment
128+ new_segment = turtle .Turtle ()
129+ new_segment .speed (0 )
130+ new_segment .shape ("square" )
131+ new_segment .color ("orange" )
132+ new_segment .penup ()
133+ segments .append (new_segment )
134+ 135+ # Shorten the delay
136+ delay -= 0.001
137+ 138+ # Increase the score
139+ score += 10
140+ 141+ if score > high_score :
142+ high_score = score
143+ 144+ pen .clear ()
145+ pen .write ("Score: {} High Score: {}" .format (score , high_score ), align = "center" , font = ("Courier" , 24 , "normal" ))
146+ 147+ # Move the end segments first in reverse order
148+ for index in range (len (segments ) - 1 , 0 , - 1 ):
149+ x = segments [index - 1 ].xcor ()
150+ y = segments [index - 1 ].ycor ()
151+ segments [index ].goto (x , y )
152+ 153+ # Move segment 0 to the location of head
154+ if len (segments ) > 0 :
155+ x = head .xcor ()
156+ y = head .ycor ()
157+ segments [0 ].goto (x , y )
158+ 159+ move ()
160+ 161+ # Check for head collision with the body segments
162+ for segment in segments :
163+ if segment .distance (head ) < 20 :
164+ time .sleep (1 )
165+ head .goto (0 , 0 )
166+ head .direction = "stop"
167+ 168+ # Hide the segments
169+ for segment in segments :
170+ segment .goto (1000 , 1000 )
171+ 172+ # Clear the segments list
173+ segments .clear ()
174+ 175+ # Reset the score
176+ score = 0
177+ 178+ # Reset the delay
179+ delay = 0.1
180+ 181+ # Update the score display
182+ pen .clear ()
183+ pen .write ("Score: {} High Score: {}" .format (score , high_score ), align = "center" ,
184+ font = ("Verdana" , 24 , "normal" ))
185+ 186+ time .sleep (delay )
187+ 188+ wn .mainloop ()
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