✓ Accepted answer
First off, capitalization count's in Lua, that mean's if you did parent(which you did) instead of Parent, it won't work. Secondly, you did local ligting.script.parent, You would do local Lighting = script.Parent. Third, you added a un-needed end unless you didn't post some part of your code here like while true do(which you can do while wait() do instead of adding a wait after). Anyway's, here is your script fixed, I won't go into to much detail on the transparency and stuff as it's pretty self explanatory.
local ligting = script.Parent
local eye1 = ligting.eye1
local eye2 = ligting.eye2
eye1.Transparency = 0
eye2.Transparency = 0
wait(10)
eye1.Transparency = 1
eye2.Transparency = 1
Here is a looped version of it, if you want it.
while wait() do
local ligting = script.Parent
local eye1 = ligting.eye1
local eye2 = ligting.eye2
eye1.Transparency = 0
eye2.Transparency = 0
wait(10)
eye1.Transparency = 1
eye2.Transparency = 1
end