-- place this after a commented-out background

randomBackground(1,0,0)

-- place the following at the end of the .level file

function randomBackground(iMod, tTab, iLen)
    local ranNum = 0
    local backgroundTable =
    {
        "m01", "m02", "m03", "m04", "m05", "m06", "m07", "m08", "m09", "m10", "m11", "m12", "m13", "m14", "m15",
        "planet", "quick", "singlesun", "tanis", "taniswstars", "black",
    }
    if ((iMod == 4) or (iMod == 5)) then
        for k = 1, iLen do
            backgroundTable[k + 22] = tTab[k]
        end
    end
    if (iMod == 1) then
        ranNum = random(20)
    elseif (iMod == 2) then
        ranNum = random(15, 22)
    elseif (iMod == 3) then
        ranNum = random(22)
    elseif (iMod == 4) then
        ranNum = random(22, 22 + iLen)
    elseif (iMod == 5) then
        ranNum = random(22 + iLen)
    end
    if (iMod ~= 0) then
        loadBackground(backgroundTable[ranNum])
        print("Level background (" .. ranNum .. "/22): \"" .. backgroundTable[ranNum] .. "\"")
    end
end