1. from turtle import *
2. from random import randint
3.  
4.  
5. tsize = 20
6. s_width = 200
7. s_height = 180
8.  
9.  
10. class Sprite(Turtle):
11.    def __init__(self, x, y, step=10, shape='circle', color='black'):
12.        Turtle.__init__(self)
13.        self.penup()
14.        self.speed(0)
15.        self.goto(x, y)
16.        self.color(color)
17.        self.shape(shape)
18.        self.step = step
19.        self.points = 0
20.  
21.  
22.    def move_up(self):
23.        self.goto(self.xcor(), self.ycor() + self.step)
24.    def move_down(self):
25.        self.goto(self.xcor(), self.ycor() - self.step)
26.    def move_left(self):
27.        self.goto(self.xcor() - self.step, self.ycor())
28.    def move_right(self):
29.        self.goto(self.xcor() + self.step, self.ycor())
30.  
31.  
32.    def is_collide(self, sprite):
33.        dist = self.distance(sprite.xcor(), sprite.ycor())
34.        if dist < 30:
35.            return True
36.        else:
37.            return False
38.  
39.  
40.    def set_move(self, x_start, y_start, x_end, y_end):
41.        self.x_start = x_start
42.        self.y_start = y_start      
43.        self.x_end = x_end
44.        self.y_end = y_end
45.        self.goto(x_start, y_start)
46.        self.setheading(self.towards(x_end, y_end)) #direction
47.  
48.    def make_step(self):
49.        self.forward(self.step) #direction already present
50.  
51.  
52.        if self.distance(self.x_end, self.y_end) < self.step: #if distance less than half step
53.            self.set_move(self.x_end, self.y_end, self.x_start, self.y_start) #change direction
54.  
55.  
56. player = Sprite(0, -100, 10, 'circle', 'orange')
57. enemy1 = Sprite(-s_width, 0, 15, 'square', 'red')
58. enemy1.set_move(-s_width, 0, s_width, 0)
59. enemy2 = Sprite(s_width, 70, 15, 'square', 'red')
60. enemy2.set_move(s_width, 70, -s_width, 70)
61. goal = Sprite(0, 120, 20, 'triangle', 'green')
62. #goal.set_move(-s_width, 120, s_width, 0)  
63.  
64.  
65. total_score = 0
66.  
67.  
68. scr = player.getscreen()
69.  
70.  
71. scr.listen()
72.  
73.  
74. scr.onkey(player.move_up, 'Up')
75. scr.onkey(player.move_left, 'Left')
76. scr.onkey(player.move_right, 'Right')
77. scr.onkey(player.move_down, 'Down')
78.  
79.  
80. while total_score < 3:
81.    enemy1.make_step()
82.    enemy2.make_step()
83.    #goal.make_step()
84.    if player.is_collide(goal):
85.        total_score += 1
86.        player.goto(0, -100)
87.    if player.is_collide(enemy1) or player.is_collide(enemy2):
88.        goal.hideturtle()
89.        break
90.  
91.  
92. if total_score == 3:
93.    enemy1.hideturtle()
94.    enemy2.hideturtle()
95.