local tv = get_trigger_variable(1)
if tv == nil then return end

local n = tv.integer

local levels = { [1] = 255, [2] = 128, [3] = 26, [4] = 0 }
local level = levels[n]
if level == nil then return end

for i = 1, 4 do
    local tl = get_timeline(i)
    if tl ~= nil then
        tl:release()
    end
end

local ok, ov = pcall(get_group_override, 0)
if ok and ov ~= nil then
    ov:set_intensity(level, 1.0)
end