how to make keybind with lua?
as example
local sampev = require 'samp.events'

function waitUntilSampAvailable()
while not isSampAvailable() do
wait(0)
end
end

function main()
waitUntilSampAvailable()
end

function sampev.onServerMessage(colour, msg)
lua_thread.create(function()
if string.find(msg, "halo") then
sampSendChat("/pm a")
end
end)
end

raksamp show some error
please help me