Why doesnt this work in Workspace?

player = game.Players.LocalPlayer
mouse = player:GetMouse()
mouse.KeyDown:connect(function(key)
		key = key:lower()
	if key == "q" then
for i = 0,0.5,.1 do
	wait()
RightShoulder = game.Workspace.Player.Torso["Right Shoulder"]
RightShoulder.C0 = RightShoulder.C0 * CFrame.fromEulerAnglesXYZ(0,-i,0)
end
for q = 0,0.5,.1 do
	wait()
RightShoulder.C0 = RightShoulder.C0 * CFrame.fromEulerAnglesXYZ(q,0,0)
end
wait()
for i = 0,0.5,.1 do
	RightShoulder.C0 = RightShoulder.C0 * CFrame.fromEulerAnglesXYZ(-i,0,0)
		wait()
end
for i = 0,0.5,.1 do
	RightShoulder.C0 = RightShoulder.C0 * CFrame.fromEulerAnglesXYZ(0,i,0)
		wait()
end
		for i = 3,45 do
			wait()
			earth = Instance.new("Part",workspace)
			earth.Size = Vector3.new(4,4,4)
			earth.CanCollide = false
			earth.BrickColor = BrickColor.new("Reddish brown")
			earth.Anchored = true
			earth.CFrame = player.Character.Torso.CFrame * CFrame.new(0,0,-5+-i) * CFrame.fromEulerAnglesXYZ(math.random(),math.random(),math.random())
			player.Character.Torso.Anchored = true
			my = game.Lighting.Earth:Clone()
			my.Parent = earth
		end
		player.Character.Torso.Anchored = false
end
end)

According to the Official ROBLOX Wiki:

"In order for a LocalScript to function, it must be placed within one of three areas:

1. In a player's Backpack (can be indirectly, through a Tool or HopperBin)

2. In a player's character model

3. In a player's PlayerGui "

So, by definition, a LocalScript will not run in the Workspace.

If you put that same code into a regular Script Instance, though, it still wouldn't work because it tries to make use of some client-only services, such as LocalPlayer and GetMouse().

LocalScript only work in the Character, Camera, and Player. Placing one in the workspace virtually disables it.

You have to put the script in StarterGui for a LocalScript to work. Only Scripts run in workspace.