ime will recognize it as the &laquo;Observer&raquo;
	design pattern.
</p>

<p>
	The main emitter of events is the <a href="ui.html">UI system</a>, which
	emits an event for every keypress and every mousemove.
</p>

<p>
	There's also the tick and frame events, which are emitted by the 
	<a href="core.html">Core system</a> for each tick and frame respectively.
</p>

<center>
	<img src="event.gif"/><br/>
	<i>Potato frog is emitting some events and potato cat is aware of it, since
	he has an Event Listener.</i>