How do I make it so when you are within a radius, and you press q on your keyboard it prints?

I'm trying to make it so when you press "q" on your keyboard and you are within a radius of a brick, it will print "q" in the output. Why won't this work?

player = game.Players.LocalPlayer
Mouse = player:GetMouse()

function onTouch()
	wait()
	for i, v in pairs(game.Players:GetChildren()) do
		if (v.Character.Torso.Position - script.Parent.Position).magnitude <=4 then
			local UIS = game:GetService("UserInputService")
			UIS.InputBegan:connect(function(Key, GPE)
				if Key.KeyCode == Enum.KeyCode.Q and not GPE then
					print"q"
				end
			end)
				--print"f"
			wait()
		else
			print"not in the radius"
		end
	end
end
script.Parent.Touched:connect(onTouch)

This is because you check for the distance between the torso and the part from outside of your InputBegan callback function; meaning, in your particular case, that the distance is being calculated on touch.

Move the if statement inside of the callback and everything should work fine.