What does this script do?

--Corvus uniform script by: shedet.
groupID=947529
shirtID=
pantsID=

game.Players.ChildAdded:connect(function(p)
p.CharacterAdded:connect(function(c)
Delay(1, function()

if p:IsInGroup(groupID) then
if c:FindFirstChild("Shirt")~=nil then c.Shirt:Destroy() end
if c:FindFirstChild("Pants")~=nil then c.Pants:Destroy() end

local news=Instance.new("Shirt",c)
news.ShirtTemplate="http://www.roblox.com/asset/?id="..shirtID - 1

local newp=Instance.new("Pants",c)
newp.PantsTemplate="http://www.roblox.com/asset/?id="..pantsID - 1

end
end)
end)
end)