How would i make flight tools? (STILL NEED HELP)

I have script which friend made me but does not work any help? It doesn't show me the tool or anything This is the code

Name = "Fly"
pi = 3.141592653589793238462643383279502884197163993751
a = 0
s = 0
ndist = 13
rs = 0.025
siz = Vector3.new(1, 1, 1)
form = 0
flow = {}
function CFC(P1,P2)
	local Place0 = CFrame.new(P1.CFrame.x,P1.CFrame.y,P1.CFrame.z) 
	local Place1 = P2.Position
	P1.Size = Vector3.new(P1.Size.x,P1.Size.y,(Place0.p - Place1).magnitude) 
	P1.CFrame = CFrame.new((Place0.p + Place1)/2,Place0.p)
end
function checktable(table, parentneeded)
	local i
	local t = {}
	for i = 1, #table do
		if table[i] ~= nil then
			if string.lower(type(table[i])) == "userdata" then
				if parentneeded == true then
					if table[i].Parent ~= nil then
						t[#t + 1] = table[i]
					end
				else
					t[#t + 1] = table[i]
				end
			end
		end
	end
	return t
end
if script.Parent.Name ~= Name then
User = game:service("Players").Nineza
HB = Instance.new("HopperBin")
HB.Name = Name
HB.Parent = User.StarterGear
script.Parent = HB
User.Character:BreakJoints()
end
speed = 100
script.Parent.Selected:connect(function(mar)
	s = 1
	torso = script.Parent.Parent.Parent.Character.Torso
	LeftShoulder = torso["Left Shoulder"]
	RightShoulder = torso["Right Shoulder"]
	LeftHip = torso["Left Hip"]
	RightHip = torso["Right Hip"]
	human = script.Parent.Parent.Parent.Character.Humanoid
	bv = Instance.new("BodyVelocity")
	bv.maxForce = Vector3.new(0,math.huge,0)
	bv.velocity = Vector3.new(0,0,0)
	bv.Parent = torso
	bg = Instance.new("BodyGyro")
	bg.maxTorque = Vector3.new(0,0,0)
	bg.Parent = torso 
	connection = mar.Button1Down:connect(function()
		a = 1
		bv.maxForce = Vector3.new(math.huge,math.huge,math.huge)
		bg.maxTorque = Vector3.new(900000,900000,900000)
		bg.cframe = CFrame.new(torso.Position,mar.hit.p) * CFrame.fromEulerAnglesXYZ(math.rad(-90),0,0)
		bv.velocity = CFrame.new(torso.Position,mar.hit.p).lookVector * speed
		moveconnect = mar.Move:connect(function()
			bg.maxTorque = Vector3.new(900000,900000,900000)
			bg.cframe = CFrame.new(torso.Position,mar.hit.p) * CFrame.fromEulerAnglesXYZ(math.rad(-90),0,0)
			bv.velocity = CFrame.new(torso.Position,mar.hit.p).lookVector * speed
		end)
		upconnect = mar.Button1Up:connect(function()
			a = 0
			moveconnect:disconnect()
			upconnect:disconnect()
			bv.velocity = Vector3.new(0,0,0)
			bv.maxForce = Vector3.new(0,math.huge,0)
			torso.Velocity = Vector3.new(0,0,0)
			bg.cframe = CFrame.new(torso.Position,torso.Position + Vector3.new(torso.CFrame.lookVector.x,0,torso.CFrame.lookVector.z))
			wait(1)
		end)
	end)
	while s == 1 do
		wait(0.02)
		flow = checktable(flow, true)
		local i
		for i = 1,#flow do
			flow[i].Transparency = flow[i].Transparency + rs
			if flow[i].Transparency >= 1 then flow[i]:remove() end
		end
		if a == 1 then
			flow[#flow + 1] = Instance.new("Part")
			local p = flow[#flow]
			p.formFactor = form
			p.Size = siz
			p.Anchored = true
			p.CanCollide = false
			p.TopSurface = 0
			p.BottomSurface = 0
			if #flow - 1 > 0 then
				local pr = flow[#flow - 1]
				p.Position = torso.Position - torso.Velocity/ndist
				CFC(p, pr)
			else
				p.CFrame = CFrame.new(torso.Position - torso.Velocity/ndist, torso.CFrame.lookVector)
			end
			p.BrickColor = BrickColor.new("Cyan")
			p.Transparency = 0.7
			p.Parent = torso
			local marm = Instance.new("BlockMesh")
			marm.Scale = Vector3.new(1.9, 0.9, 1.725)
			marm.Parent = p
			local amplitude
			local frequency
			amplitude = pi
			desiredAngle = amplitude
			RightShoulder.MaxVelocity = 0.4
			LeftShoulder.MaxVelocity = 0.4
			RightHip.MaxVelocity = pi/10
			LeftHip.MaxVelocity = pi/10
			RightShoulder.DesiredAngle = desiredAngle
			LeftShoulder.DesiredAngle = -desiredAngle
			RightHip.DesiredAngle = 0
			LeftHip.DesiredAngle = 0
		end
	end
end)
script.Parent.Deselected:connect(function()
a = 0
s = 0
bv:remove()
bg:remove()
if connection ~= nil then
connection:disconnect()
end
if moveconnect ~= nil then
moveconnect:disconnect()
end
if upconnect ~= nil then
upconnect:disconnect()
end
while s == 0 do
	wait()
	if #flow > 0 then
		flow = checktable(flow, true)
		local i
		for i = 1,#flow do
			flow[i].Transparency = flow[i].Transparency + rs
			if flow[i].Transparency >= 1 then flow[i]:remove() end
		end
	end
end
end)
while true do
	wait()
	if s == 1 then
		return
	end
end
script:remove()

Not sure if these 2 problems are effective on your script, but:

Line 37. You are supposed to put "Name" in string. Line 38. You are supposed to parent it in the backpack, not the startergear, otherwise you need to reset for the tool.