"attempt to call a nil witch CFrame " when streaming enabled is active

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1

I have a localscript that allows to send rays when I put a command in the chat. The problem is that with Streaming enabled it won’t work. I know I have to add “RequestStreamAroundAsync()” at the problem location, but I don’t know how to do it.
Code:

local function createLighting(part, tool, f)

local point1 = tool.Handle.CFrame:toWorldSpace(CFrame.new(-1.5, 0, 0))
local point2
local core, outer

local connection = runs.RenderStepped:Connect(function()

	point2 = part.CFrame:toWorldSpace(CFrame.new(math.random() * 1 - 0.5, math.random() * 1 - 0.5, 0))
	
		core = line(point1, point2, part, 0.2, 0, BrickColor.new("Institutional white"))
		outer = line(point1, point2, part, 0.6, 0.75, part.BrickColor)
	
		point1 = point2
	
		if f then
			f(outer)
		end				

end)	

part.Changed:Connect(function(property)

	if property == "Parent" then
		wait(0.1)
		connection:Disconnect()		
	end
end)

end

The problem is in “point2 = part.CFrame:toWorldSpace(CFrame.new(math.random() * 1 - 0.5, math.random() * 1 - 0.5, 0))”