Simple Origami: Making an Origami Bird Base

This is a first post in a series of posts, which would describe the basics of origami. Many origami models use a set of very common patterns, and their variations, and I think it is very important that you would be familiar with some of the most popular and simple ones.
This one is called a Bird Base, and it is the most common pattern I can think of. Most of the origami instructions begin with the words "start from a bird base" or something like that. And origami dragons are not an exception.
Here is what a bird base looks like.
Note: All images are clickable. Click any of the images to see them in slightly larger resolution.

Follow these step by step origami instructions below to make the bird base.

Start with a square sheet of paper. Fold a first diagonal crease.

...and a second one.

Now turn the paper to the other side...

...and fold it twice like so.

Bring the corners together.

You should have something like this by now. This is called a square base, and it is so simple to make it that it does not really deserves a separate post with instructions on how to fold it, in my opinion.
Now, lets go on. Ensure that the four corners you have brought together are at the bottom, and make this simple fold.

And same on the left.

Fold the top like so.

And unfold three last steps.

Take the corner and bring it to the top.

To get this. You would have to reverse some folds while you do that, since they are pointing backwards. It's ok.

Now turn the model to its other side.

And repeat the process.

Here you go! You have just folded your first bird base! If it's not your first, then why would you need instructions to do it? ;)