facebook privacy setting question!!?

[Grace]

when i first got my fb i had changed the settings so that if a stranger typed in my name and went on my profile it would say ''Grace only shares some information publicly. If you know Grace, send her a friend request.'' now that i am older i want strangers to be able to view my complete profile/wall
how do i do so????
also, it doesnt have the ''public'' option mentioned in an answer. it only has friends, friends of friends, and custom

[Tou]

Go to Facebook.com
Login
Top right side of the screen by Home and click the drop down box next to it
Click Privacy Settings
Select "Public" under "Control Your Default Privacy"

[BOY]

Go to setting then idk