Error on line 60 help?

I'm making an admin script and theres 2 errors first one saying on line 28 Character is a nil value and I believe the variable NewPlayer isn't working

**here's my script : **

--Commands

--chat commands--
--Green
--Red
--Yellow
--Blue

--key commands--
--z    

local AdminTable = {"YouShalllNotPass", "Player", "Player1"}
function IsAdmin(PlayerInstance)
 local PlayerName = PlayerInstance.Name:lower()
 for i = 1, #AdminTable do
  local AdminName = AdminTable[i]:lower()
  if AdminName == PlayerName then
   return true
  end
 end
 return false
end
game.Players.PlayerAdded:connect(function(NewPlayer)
 local NewPlayer = NewPlayer
 if IsAdmin(NewPlayer) then
print'Ventivian Commands have been hooked into the system'

local s1 = Instance.new("SelectionBox", NewPlayer.Character.Head)
	s1.Adornee = s1.Parent
	s1.Color = BrickColor.new("Medium stone grey")
	s1.Transparency = 0.5
	
local s2 = Instance.new("SelectionBox", NewPlayer.Character:FindFirstChild("Right Leg"))
		s2.Adornee = s2.Parent
			s2.Color = BrickColor.new("Medium stone grey")
				s2.Transparency = 0.5
				
local o = Instance.new("SelectionBox", NewPlayer.Character:FindFirstChild("Left Leg"))
		o.Adornee = o.Parent
			o.Color = BrickColor.new("Medium stone grey")
				o.Transparency = 0.5
				
local  s4 = Instance.new("SelectionBox", NewPlayer.Character:FindFirstChild("Right Arm"))
		s4.Adornee = s4.Parent
			s4.Color = BrickColor.new("Medium stone grey")
				s4.Transparency = 0.5
				
local  s5 = Instance.new("SelectionBox", NewPlayer.Character:FindFirstChild("Left Arm"))
		s5.Color = BrickColor.new("Medium stone grey")
			s5.Transparency = 0.5
		s5.Adornee = s5.Parent
		
		local h = Instance.new("StringValue", game.Workspace)
		h.Value = ""
		h.Name = "Kicked"
		
	local Mouse = NewPlayer:GetMouse()
	
	Mouse.KeyDown:connect(function(key)
		if key == "z" then
			
			if Player.PlayerGui:FindFirstChild("ScreenGui") then
				Player.PlayerGui.ScreenGui:Destroy()
			else
		local b = Instance.new("ScreenGui", NewPlayer.PlayerGui)
		
		local x = Instance.new("Frame", b)
		x.Name = "Menu"
		x.BackgroundColor3 = Color3.new(0, 255, 0)
		x.BackgroundTransparency = 0.5
		x.Size = UDim2.new(.15, 0, .5, 0)
		x.Position = UDim2.new(0, 10, 0, 10)
		
		local c = Instance.new("TextButton", x)
		c.Position = UDim2.new(.25, 0, .5, 0)
		c.BackgroundTransparency = 0
		c.BackgroundColor3 = Color3.new(0, 0, 0) 
		c.Size = UDim2.new(0, 100, 0, 25)
		c.TextColor3 = Color3.new(0, 255, 0)
		c.Style = 3
		c.Text = "Kick"
		
		local v = Instance.new("TextBox", x)
		v.Size = UDim2.new(0, 100, 0, 50)
		v.Position = UDim2.new(.25, 0, .25, 0)
		v.Name = "TextBox"
		
		local n = Instance.new("Frame", b)
		n.Name = "Menu2"
		n.BackgroundColor3 = Color3.new(0, 255, 0)
		n.BackgroundTransparency = 0.5
		n.Size = UDim2.new(.15, 0, .5, 0)
		n.Position = UDim2.new(.2, 0, 0, 10)
		
		local a = Instance.new("TextButton", n)
		a.Position = UDim2.new(.25, 0, .5, 0)
		a.BackgroundTransparency = 0
		a.BackgroundColor3 = Color3.new(0, 0, 0) 
		a.Size = UDim2.new(0, 100, 0, 50)
		a.TextColor3 = Color3.new(0, 255, 0)
		a.Style = 3
		a.Text = "GodMode"
		a.Font = "SourceSansBold"
		a.FontSize = "Size24"
		
		local a1 = Instance.new("TextBox", n)
		a1.Position = UDim2.new(.25, 0, .30, 0)
		a1.Size = UDim2.new(0, 100, 0, 50)

		local a2 = Instance.new("TextButton", n)
		a2.Position = UDim2.new(.25, 0, .1, 0)
		a2.BackgroundTransparency = 0
		a2.BackgroundColor3 = Color3.new(0, 0, 0) 
		a2.Size = UDim2.new(0, 100, 0, 50)
		a2.TextColor3 = Color3.new(0, 255, 0)
		a2.Style = 3
		a2.Text = "Change Fog"
		a2.Font = "SourceSansBold"
		a2.FontSize = "Size12"
		
		local n1 = Instance.new("Frame", b)
		n1.Name = "Menu3"
		n1.BackgroundColor3 = Color3.new(0, 255, 0)
		n1.BackgroundTransparency = 0.5
		n1.Size = UDim2.new(.15, 0, .5, 0)
		n1.Position = UDim2.new(.4, 0, 0, 10)
		
		local n2 = Instance.new("TextBox", n1)
		n2.Position = UDim2.new(.25, 0, .30, 0)
		n2.Size = UDim2.new(0, 100, 0, 50)	
		
		local c1 = Instance.new("TextButton", n1)
		c1.Position = UDim2.new(.25, 0, .5, 0)
		c1.BackgroundTransparency = 0
		c1.BackgroundColor3 = Color3.new(0, 0, 0) 
		c1.Size = UDim2.new(0, 100, 0, 25)
		c1.TextColor3 = Color3.new(0, 255, 0)
		c1.Style = 3
		c1.Text = "Change WalkSpeed"
		
		--button scripts
		
		a.MouseButton1Down:connect(function(click2)
			if NewPlayer.Character.Humanoid.MaxHealth == math.huge then
				NewPlayer.Character.Humanoid.MaxHealth = 100 
			else
				NewPlayer.Character.Humanoid.MaxHealth = math.huge
				end
			end)
		
		c.MouseButton1Down:connect(function(click)
			game.Workspace.Kicked.Value = NewPlayer.PlayerGui.ScreenGui.Menu.TextBox.Text
				
	local o1 = Instance.new("SelectionBox", game.Workspace:FindFirstChild(game.Workspace.Kicked.Value):FindFirstChild("Left Leg"))
		o1.Adornee = o1.Parent
		o1.Color = BrickColor.new("Medium stone grey")
		o1.Transparency = 0.5
	
		local o2 = Instance.new("SelectionBox", game.Workspace:FindFirstChild(game.Workspace.Kicked.Value):FindFirstChild("Left Arm"))
		o2.Adornee = o2.Parent
		o2.Color = BrickColor.new("Medium stone grey")
		o2.Transparency = 0.5
		
		local o3 = Instance.new("SelectionBox", game.Workspace:FindFirstChild(game.Workspace.Kicked.Value):FindFirstChild("Right Arm"))
		o3.Adornee = o3.Parent
		o3.Color = BrickColor.new("Medium stone grey")
		o3.Transparency = 0.5
		
			local o4 = Instance.new("SelectionBox", game.Workspace:FindFirstChild(game.Workspace.Kicked.Value):FindFirstChild("Right Leg"))
		o4.Adornee = o4.Parent
		o4.Color = BrickColor.new("Medium stone grey")
		o4.Transparency = 0.5
		
		local o5 = Instance.new("SelectionBox", game.Workspace:FindFirstChild(game.Workspace.Kicked.Value):FindFirstChild("Torso"))
		o5.Adornee = o5.Parent
		o5.Color = BrickColor.new("Medium stone grey")
		o5.Transparency = 0.5
		wait(1)
		game.Players:FindFirstChild(game.Workspace.Kicked.Value):Kick()
		end)
		
			a2.MouseButton1Down:connect(function(click3)
			game.Lighting.FogEnd = a1.Text
			end)

			c1.MouseButton1Down:connect(function(click4)
			Player.Character.Humanoid.WalkSpeed = n2.Text
			end)
			

NewPlayer.Chatted:connect(function(message)
if message == "Blue" then
s1.Color = BrickColor.new("Bright blue")
s2.Color = BrickColor.new("Bright blue")
o.Color = BrickColor.new("Bright blue")
s4.Color = BrickColor.new("Bright blue")
s5.Color = BrickColor.new("Bright blue")	
end
end)

NewPlayer.Chatted:connect(function(message)
if message == "Red" then
s1.Color = BrickColor.new("Bright red")
s2.Color = BrickColor.new("Bright red")
o.Color = BrickColor.new("Bright red")
s4.Color = BrickColor.new("Bright red")
s5.Color = BrickColor.new("Bright red")
end
end)

NewPlayer.Chatted:connect(function(message)
if message == "Green" then
s1.Color = BrickColor.new("Bright green")
s2.Color = BrickColor.new("Bright green")
o.Color = BrickColor.new("Bright green")
s4.Color = BrickColor.new("Bright green")
s5.Color = BrickColor.new("Bright green")
end
end)

NewPlayer.Chatted:connect(function(message)
if message == "Yellow" then
s1.Color = BrickColor.new("Bright yellow")
s2.Color = BrickColor.new("Bright yellow")
o.Color = BrickColor.new("Bright yellow")
s4.Color = BrickColor.new("Bright yellow")
s5.Color = BrickColor.new("Bright yellow")
	end
end)

		end
	end
end)
 end
end)