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from random import randint
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import turtle
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import math
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number_of_turtles = 20
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steps_of_time_number = 300
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turtle.screensize(100, 150)
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pool = [turtle.Turtle(shape='turtle') for i in range(number_of_turtles)]
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for unit in pool:
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unit.penup()
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unit.speed(350)
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unit.goto(randint(-200, 200), randint(-150, 150))
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unit.left(randint(-180, 180))
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unit.rev_x = False
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unit.rev_y = False
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for i in range(steps_of_time_number):
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for unit in pool:
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x, y = unit.xcor(), unit.ycor()
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if abs(x) >= turtle.screensize()[0] and not unit.rev_x:
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unit.seth(90 - unit.heading())
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unit.rev_x = True
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elif not abs(x) >= turtle.screensize()[0]:
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unit.rev_x = False
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if abs(y) >= turtle.screensize()[1] and not unit.rev_y:
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unit.seth(-unit.heading())
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unit.rev_y = True
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elif abs(y) < turtle.screensize()[1]:
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unit.rev_y = False
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unit.forward(7)
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for another_unit in pool:
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if another_unit == unit:
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continue
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if math.hypot(another_unit.xcor() - unit.xcor(), another_unit.ycor() - unit.ycor()) < 6:
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angle = randint(-180, 180)
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unit.seth(angle)
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another_unit.seth(-angle)
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unit.forward(2)
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another_unit.forward(2)
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