1 from turtle import *
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6
7 def Ying(radius, color1, color2):
8 'this whole function block draws just one fish'
9 width(3) # the width of the pen. From 1 to 3.
10 color("black", color1) # now, this defines the color of the fish's body
11 begin_fill()
12 circle(radius / 2, 180) # a circle with half the defined radius and a half arc (essentially the fish's head)
13 circle(radius, 180)
14 left(180) # turn the pen's head anticlockwise by 180 degrees
15 circle(-radius / 2, 180) # the smaller body circle
16 end_fill()
17 color(color1, color2) # this defines that of its eyes
18 begin_fill()
19 right(-90)
20 penup()
21 forward(radius / 1.3)
22 pendown()
23 right(-90)
24 circle(radius / 5)
25 end_fill()
26 right(-90)
27 penup()
28 forward(radius / 1.3)
29 pendown()
30 right(90)
31 hideturtle()
32
33
34 Ying(120, "black", "white") # the first fish
35
36 Ying(120, "white", "black") # the second fish