3-way and 4-way Light Switches - When and Why you need them

Sometimes a single pole light switch is not enough to control the lights. With multiple points of access, you may need 2 or more switches to control the lights in a space.
This is where 3-way and 4-way switches come in. These switches allow an 0n/Off control of the lights from any of the access points. Using this avoids a Primary/Secondary setup where one switch will permanently turn off the lights no matter what the other switches are set to.
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How can you draw this in actual diagram? Wiring
Like the actual set lets say you have a 2bulb and its is controlled in 3 different locations what is it look like in a actual wiring diagram

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Light switch diagram

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