I accidently deleted my wifi network, how do i get it back?

i accidently deleted my wifi network in system preferences. How do i get it back?
the signal in the right top corner has a cross in it and it says WIFI: Not configured.
Does anyone know how i can get it back? Im not familiar with Mac.

Open up System Preferences
Open Network
Click the + (plus) button at the bottom of the connection list on the left
Select WiFi
Name the selection WiFi
Click Create
Click Apply down at the lower right of the window
Close the window

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