Led Battery

How do I add a switch to a basic circuit battery run?
How do I add a switch to run a basic circuit battery? Its literally a LED and a battery, but I would add a switch on / off with it. How can I do?
LED Battery ---------- ----------- -------- ----- PT connect the switch back to the left Ok, It is a little hard to draw a diagram of a keyboard. The point is a SPST switch will two terminals and are only connected in series with the rest of the circuit.
Led Battery
Led Battery











