What is wrong with this script? Sorry I'm a beginner!

What your script looked like:

local function Ghostify (part) part.transparency = 0 wait (0.5) part.transparency = 0.1 wait (0.5)
part.transparency = 0.2 wait (0.5) part.transparency = 0.3 wait (0.5)
part.transparency = 0.4 wait (0.5) part.transparency = 0.5 wait (0.5)
part.transparency = 0.6 wait (0.5) part.transparency = 0.7 wait (0.5)
part.transparency = 0.8 wait (0.5)
part.transparency = 0.9 wait (0.5) part.transparency = 1 wait (0.5)

for i = 1, 5 do parent:ghostify() end

This is as much as I can do, but I think it needs some corrections:

H = game.Workspace

local function Ghostify (Part)
H.Part.Transparency = 0
wait (0.5)
H.Part.Transparency = 0.1
wait (0.5)
H.Part.Transparency = 0.2
wait (0.5)
H.Part.Transparency = 0.3
wait (0.5)
H.Part.Transparency = 0.4
wait (0.5)
H.Part.Transparency = 0.5
wait (0.5)
H.Part.Transparency = 0.6
wait (0.5)
H.Part.Transparency = 0.7
wait (0.5)
H.Part.Transparency = 0.8
wait (0.5)
H.Part.Transparency = 0.9
wait (0.5) 
H.Part.Transparency = 1
wait (0.5)
for i = 1, 5 do Parent:ghostify()
end

I think..

if workspace:FindFirstChild("Part")then
for i=1,workspace.Part,0.5 do
workspace.Part.Transparency=workspace.Part.Transparency+i 
end
else
print("Part doesn't exist")
end