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Starting a New Project

Let's start by opening Fritzing and creating a new empty sketch.
From the Fritzing menu bar, select File > New > Fritzing Sketch.
The New Fritzing Diagram window opens. Specify a name and location
for the new sketch, and click Finish.

The Environment

You will now notice Fritzing´s environment sections:

1. the Menu bar
2. the Tool bar
3. the Stage
4. the Palette window
5. the Properties window
6. the Overview window

Building a Circuit

We will now build a circuit by placing and connecting parts on the stage.
First, we need an Arduino board. Click on the Arduino icon in the palette
window (under Parts) and click again to place it on the stage.
Notice that a text field is highlighted. Type a name and press ENTER.

Place a breadboard, a resistor, a button and an LED on the stage.
You can organize the stage by moving and rotating these parts.
To move a part - select, click & drag.
To rotate a part - select, click & drag a parts corner.
To delete a part - select and press BACKSPACE.
For a better view of the stage, you can zoom in and out using the Zoom
tool (from the palette window) or the Zoom flip menu in the tool bar.

We can now start connecting parts together. Select the Wire tool from
the palette window and click on the LED´s "+" terminal. As you click &
drag, a wire is created. Drag the wire to Arduino´s digital pin (13) and
release the mouse button. The LED is now connected with Arduino.
Give the wire a unique name and press ENTER. Repeat the last steps
until you have all parts connected as shown in the photo below.
To bend wires, click & drag any part of a wire.

Editing a Circuit

Now that we have all parts connected, let's see how we can modify the
properties of each part. Select the resistor and have a look at the properties
window. The Core properties of a resistor are Name, Part Number and Value.
You can modify any of these properties at any time. Click on Value and type
2200 (2.2 KOhm). Select a wire and check its Appearance information in the
properties window. Here you can modify fonts, colors and routing styles.
Click on the stroke color icon and choose a new color for the wire. Choose
between oblique and rectilinear routing and adjust its smoothness as you wish.

You can leave notes on the stage by using the Notes tool from the palette window.When you're done editing your circuit, it should look more or less
like the example below.

Saving and Exporting a Circuit

Finally, save your sketch by selecting File > Save.
You're now ready to export your circuit to Eagle and create a PCB layout.
Select File > Export > as Arduino Shield PCB and follow the instructions in
the Creating a PCB Layout section.