Getting an error when running this lua script.

Trying to run a bhop & auto-strafe script.

The error I receive is:
[ERROR] lua/bhop.lua:40: attempt to call global 'LocalPlayer' (a nil value)
1. unknown - lua/bhop.lua:40

local bhop = { };
bhop.MetaPlayer = FindMetaTable( "Player")
bhop.oldKeyDown = bhop.MetaPlayer['KeyDown']
local bhopOn = true;
local bhopSOn = true;
local bhopHooks = { hook = { }, name = { } };
bhop.left = false
bhop.right = false
bhop.jump = false
bhop.what = true
function bhop.AddHook(hookname, name, func)
table.insert( bhopHooks.hook, hookname );
table.insert( bhopHooks.name, name );
hook.Add( hookname, name, func );
end
bhop.MetaPlayer['KeyDown'] = function( self, key )
if self != LocalPlayer() then return end
if (key == IN_MOVELEFT) and bhop.left then
return true
elseif (key == IN_MOVERIGHT) and bhop.right then
return true
elseif (key == IN_JUMP) and bhop.jump then
return true
else
return bhop.oldKeyDown( self, key )
end
end

function bhop.spamjump()
bhop.what = false
bhop.jump = true
timer.Simple(.05, function()
bhop.jump = false
timer.Simple( .25, function()
bhop.what = true
end)
end)
end

local oldEyePos = LocalPlayer():EyeAngles()--This is to see where player is looking
function bhop.CreateMove( cmd )
local JumpReleased = false;
if (cmd:KeyDown( IN_JUMP )) then

if (!JumpReleased) then
if (bhopOn && !LocalPlayer():OnGround()) then --Bhop here
cmd:RemoveKey( IN_JUMP );
if bhop.what then
bhop.spamjump()
end
end
else
JumpReleased = false
end

if(bhopSOn ) then--auto strafer
local traceRes = LocalPlayer():EyeAngles()

if( traceRes.y > oldEyePos.y ) then --If you move your mouse left, walk left, if you're jumping
oldEyePos = traceRes;
cmd:SetSideMove( -1000000 )
bhop.left = true
timer.Simple(1, function() bhop.left = false end)
end

if( oldEyePos.y > traceRes.y ) then --If you move your mouse right, move right, while jumping
oldEyePos = traceRes;
cmd:SetSideMove( 1000000 )
bhop.right = true
timer.Simple(1, function() bhop.right = false end)
end
end
elseif (!JumpReleased) then
JumpReleased = true;
end

end

bhop.AddHook( "CreateMove", tostring(math.random(0, 133712837)), bhop.CreateMove )--add the hook
concommand.Add( "bhop", function () --Toggler
if bhopOn then
print("Bhop off")
bhopOn = false;
else
print("Bhop on")
bhopOn = true;
end
end )
concommand.Add( "bhop_strafe", function ()
if bhopSOn then
print("Strafe off")
bhopSOn = false;
else
print("Strafe on")
bhopSOn = true;
end
end)
concommand.Add("bhop_unload", function()
for i = 1, #bhopHooks.hook do
hook.Remove( bhopHooks.hook[i], bhopHooks.name[i] );
print( "Unhooked "..bhopHooks.hook[i].." using name "..bhopHooks.name[i] );
end
concommand.Remove("bhop_strafe")
concommand.Remove("bhop")
bhopOn = false;
bhopSOn = false;
print("Bhop unloaded")
table.Empty( bhopHooks )
concommand.Remove( "bhop_unload" )
end)