extends.js

Weapon = Class.extend({
    init: function() {
    }
});

MachineGun = Weapon.extend({
    init: function() {
    }
});

Weapon          = Class.extend({});
MachineGun      = Weapon.extend({});
Entity          = Class.extend({});
ChainGun        = Weapon.extend({});
Teleporter      = Entity.extend({});
EnergyCanister  = Entity.extend({});