How do I fix this?

I made a script and asked how do I make this in a specific timing. Which I did, but it didn't go in order. I asked that question as well, but what they told me was to put: for i,v in ipairs(tab) do, but all it did was show the bin.Decal only and not the rest. This is the script:

local bin = script.Parent
local decal = bin.Decal
--The numbers(5.5) are how long to wait for each slide.
local MainSlides = {
["http://www.roblox.com/asset/?id=213163470"] = 15, 
["http://www.roblox.com/asset/?id=213486920"] = 3,
["http://www.roblox.com/asset/?id=157656296"] = 3,
["http://www.roblox.com/asset/?id=213486967"] = 3, 
["http://www.roblox.com/asset/?id=151111211"] = 3,
["http://www.roblox.com/asset/?id=213487020"] = 3
}

function runTable(tab)
    for i,v in pairs(tab) do
        decal.Texture = i
        wait(v)
    end
end

while wait() do
    runTable(MainSlides)
end