title: How to initialize multiple turtles in Python with classes
body: <p>I am a beginner at Python and I'm new to Stack Exchange. I'm trying to write a program that has 5 turtles moving within a square. I've got code that does what I want, but it's tedious and I'd like to initialize all my turtles using classes instead of doing it one by one. I just want them to start out at random coordinates and with a random heading.  </p>
  
  <p>The problems with my code:</p>
  
  <ul>
  <li><p>Only one turtle is shown on screen. Two are defined in the code below.</p></li>
  <li><p>The turtle's heading and coordinates aren't being initialized.</p></li>
  </ul>
  
  <p>Here's the code that I've tried: </p>
  
  <pre><code>import numpy as np
  from turtle import *
  
  # setting up screen
  reset()
  screensize(550)
  Screen().bgcolor('black')
  tracer(0)
  
  # drawing box
  t0 = Turtle()
  t0.penup()
  t0.goto(-256,-256)
  t0.color('cyan')
  t0.pendown()
  for i in range(4):
      t0.forward(512)
      t0.left(90)
  t0.ht()
  
  # parameters
  velocity = 5
  iterations = 200
  boxsize = 512
  ranheader = np.random.random()*360
  ranx = np.random.random()*boxsize
  rany = np.random.random()*boxsize
  
  class turtle_agents(Turtle):
      def _init_(self):
          self.up()
          self.seth(ranheader)
          self.setpos(ranx,rany)
          self.velocity = velocity
          self.down()
  
  # turtle
  t1 = turtle_agents()
  t1.color('green')
  t2 = turtle_agents()
  t2.color('blue')
  
  # turtle movement
  for turtle in turtles():
      for i in range(iterations):
          turtle.forward(velocity)
          if turtle.xcor() &gt;= 256:
              turtle.goto(-256,t0.ycor())
          elif turtle.xcor() &lt;= -256:
              turtle.goto(256,t0.ycor())
          elif turtle.ycor() &gt;= 256:
              turtle.goto(t0.xcor(),-256)
          elif turtle.ycor() &lt;= -256:
              turtle.goto(t0.xcor(),256)
  
  update()    
  exitonclick()
  </code></pre>