Why is this returning nil?

I'm trying to print the name of part that is raycast too,but it prints nil. Why does it print nil and how do I fix it?

How I have it setup The red part is Part1 The green part is named Part

while wait()do
local Ray = Ray.new(game.Workspace.Part1.Position,--the ray will start at this part
game.Workspace.Part1.CFrame.lookVector.unit)--Ray will come out of the front

local hit,position = Workspace:FindPartOnRay(Ray,_)

print(hit)--print name of thing that the ray hit
end

For adark

while wait()do
    local Ray = Ray.new(game.Workspace.Part1.Position,
    game.Workspace.Part1.CFrame.lookVector.unit*10) -- 1000 is normally used, but you can reduce as you see fit. Not multiplying this is only 1 stud from Part1's *center* towards its lookVector.

    local hit = Workspace:FindPartOnRay(Ray)

    if hit:IsA("Part") then
	game.Workspace.Part1.BrickColor = BrickColor.new("Bright green")
else
	game.Workspace.Part1.BrickColor = BrickColor.new("Bright red")
end
end