Green lantern

run = game:GetService("RunService")
local MyMouse = game.Players.epiclightining:GetMouse()
plr = game.Players.epiclightining
Player = game.Players.epiclightining
RightShoulder = plr.Character.Torso["Right Shoulder"]
LeftShoulder = plr.Character.Torso["Left Shoulder"]
Run = game:GetService("RunService")
lantern = false
g = Instance.new("Part", game.Players.epiclightining.Character)
g.Name = "cy"
g.CFrame = plr.Character.cy.CFrame *CFrame.new(.5, .5, .5)
f = Instance.new("SpecialMesh", g)
f.MeshId = "http://www.roblox.com/asset/?id=3270017"
f.Scale = Vector3.new(.26, .26, .26)
g.BrickColor = BrickColor.Green()
Shirt = Instance.new("Shirt", plr.Character)
Shirt.ShirtTemplate = "http://www.roblox.com/asset/?id=235998635"
Pant = Instance.new("Pants", plr.Character)
Pant.PantsTemplate = "http://www.roblox.com/asset/?id=225445597"
function Weld()
        local w = Instance.new("Weld")
        w.Part0 = plr.Character.cy
        w.Part1 = plr.Character["Right Arm"]
        w.C0 = CFrame.fromEulerAnglesXYZ(0, 0, 0) * CFrame.new(0, 0, 0) --First CFrame is rotation, second Cframe is where it goes.
        w.C1 = CFrame.fromEulerAnglesXYZ(1.6, 0, 0) * CFrame.new(.3, .1, 1.1) --This is the second brick (the one you want to move most of the
        w.Parent = game.Workspace
end
Weld()
lantern = true
MyMouse.KeyDown:connect(function(key)
        if string.lower(key) == "f" then
	local z = Instance.new("Part", game.Workspace)
	z.Size = Vector3.new(7, 7, 0)
	z.CFrame = plr.Character.Torso.CFrame *CFrame.new(0, 0, -4)
	wait(.01)
	z.Transparency = .5
	z.BrickColor = BrickColor.new("Lime green")
	z.Name = "Block"
	local function Welds()
        local w = Instance.new("Weld")
        w.Part0 = z
        w.Part1 = plr.Character.Torso
        w.C0 = CFrame.fromEulerAnglesXYZ(0, 0, 0) * CFrame.new(0, 0, 4) --First CFrame is rotation, second Cframe is where it goes.
        w.C1 = CFrame.fromEulerAnglesXYZ(0, 0, 0) * CFrame.new(0, 2, 0) --This is the second brick (the one you want to move most of the
        w.Parent = game.Workspace
		z.Anchored = true
	end
	--Welds()

	end

end)
MyMouse.KeyUp:connect(function(key)
		if string.lower(key) == "f" then
			local z = game.Workspace.Block
			z:Destroy()
		end
	end)
--	if not string.reverse(key) == "f" then if  string.lower(key) == "f" and lantern == true then
--		z:Destroy()
--	end