#!/usr/bin/env python
"""circuits Hello World"""

from circuits import Component, Event


class hello(Event):
    """hello Event"""


class terminate(Event):
    """terminate Event"""


class App(Component):
    def hello(self):
        """Hello Event Handler"""
        print('Hello World!')

    def started(self, *args):
        """
        Started Event Handler

        This is fired internally when your application starts up
        and can be used to trigger events that only occur once
        during startup.
        """
        self.fire(hello())  # Fire hello Event
        self.fire(terminate())

    def terminate(self):
        raise SystemExit(0)  # Terminate the Application


App().run()