Sketch to send data form Ardoaino fio via xbee and received on the computer

Hello I have Ardoaino fio and xbee unit on it. Used as a transmitter.
And device 2 includes xbee explorer connected to a computer. Used to receive data.
I want to transmit from the transmitter only a simple text message that includes only numbers "123456789"
in a loop.

And on the receiver I want to receive the information.
I would be happy if you help me with this basic code listing.

The process is EXACTLY the same as if the Arduinos were connected by wires. What have YOU tried?