How to add ... in this script? :D

I made this script, but what I can't figure out is adding sounds to some of the decals for when it shows them, but I also want some pictures to go either fast or slow. So like 10 of them goes like 2.5 sec and the other one is like 5 sec. This is the script what I put so far:

bin = script.Parent
decal = bin.Decal

WaitTime = 5.5 -- Wait 5.5 sec. to each decal

MainSlides = {"http://www.roblox.com/asset/?id=154539172", "http://www.roblox.com/asset/?id=177042272",
"http://www.roblox.com/asset/?id=157119414", "http://www.roblox.com/asset/?id=175271294",
"http://www.roblox.com/asset/?id=198632478"}

function runTable(table, delayTime)
	for i=1,#table do
		decal.Texture = table[i]
		wait(delayTime)
	end
end

while true do
	runTable(MainSlides, WaitTime)
end

I am sorry if I am not smart to do it. Thank you!