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

local v = tv.integer

if v < 0 then v = 0 end
if v > 100 then v = 100 end

local level = v / 100.0

local grp = nil
local ok
ok, grp = pcall(get_group, 0)
if not ok or grp == nil then
    ok, grp = pcall(get_group, 'All Fixtures')
end

if ok and grp ~= nil then
    grp:set_master_intensity(level)
end