Form follow Function, Function Follow Forms.

What is Form follow Function?
For myself, I think it means that the form of an object is followed the function of its.
Just like Keyboard is design for pressing, so the keyboard have many keys on its.
The car's tyres is designed for rolling, so it is round.
The pencil is for holding and write, so it is cylinder and long shape to easy the user to use.

So, what about Function follow forms?
Function follow forms is like the function is depend on the forms of the objects.
Like the door knob, there is different type of door knob design.
But their main usage is to open a door, even their shape are different.
Example like the door knob is round, we will rotate it to open the door.
but when the shape is changed to handle, we will hold the handle and push down to open the door.
below are the example of the door knobs.

This is the Sixteenth post since I joined Environment Design class.