Temperature controlled fan using Arduino

I am using Arduino Uno, a temperature sensor(LM35), and a 5 volt minfan. I need some suggestions on how to set up my circuit board and which output or inputs to use on the Arduino. Also help on how to write the program after I have set it up. The objective is for the fan to change speeds according to what the temperature sensor reads. For instance, if the sensor read a low temperature the fan should operate at a low speed and if it read a high temperature the fan should operate at a high speed.

How many times are you going to ask the same question? Stop cross-posting.

There are examples in the Playground for temperature sensors. Someone posted a sketch on one of your other threads.