init_turtles.py

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#!/usr/bin/env python

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# Simple script to clear the turtlesim display on startup.

import roslib; roslib.load_manifest('turtle_concert')
import rospy
from turtlesim.srv import *

rospy.init_node('clear_turtles')
rospy.wait_for_service('kill')
kill_turtle = rospy.ServiceProxy('kill',Kill)
response=kill_turtle("turtle1")

# Only because we can't get services publicly exposed yet.
# The master sync can do it, but am not yet doing it
rospy.wait_for_service('spawn')
spawn_turtle = rospy.ServiceProxy('spawn',Spawn)
response=spawn_turtle(5.4,6.4,0.0,"kobuki")
response=spawn_turtle(5.4,4.4,0.3,"guimul")