Creates an new object of type val. The parent argument is optional; If it is supplied, the object will be parented to that object.

Performance note: When the Instance/Parent|Parent of an object is set, Roblox begins listening to a variety of different property changes for replication, rendering and physics. Therefore, it is recommended to set the Parent property last when creating new objects. As such, you should avoid using the second argument (parent) of this function. You can read this thread on the developer forum for more information.