Electrical Stair circuit

How to make Electrical stair circuit

 This is the circuit diagram of Electrical stair circuit , as you can see that the button there is used for a electrical stair circuit is not a ordinary button that is used commonly, because a common button has only two contacts
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but this button has three contacts , you can easily see these buttons on the both diagrams.This button is called two way switch.

Due to that stair circuit is also some times called a two way circuit.

To make this circuit just follow the above image and connect the wires accordingly just like the below image.

One point to be note that Phase must be controlled through the two way switches and neutral must be directly gives to the Bulb.