 line of any GDScript file must be <code>extends &lt;Class></code>, where <code>&lt;Class></code> is some existing built-in or user-defined class. For example, if you&rsquo;re attaching a script to a <code>KinematicBody2D</code> node, then your script would start with <code>extends KinematicBody2D</code>. This states that your script is taking all the functionality of the built-in <code>KinematicBody2D</code> object and <em>extending</em> it with additional functionality created by you.</p><p>In the rest of