diff --git a/README.md b/README.md
index c5073d7..86fce2b 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,58 @@
-# minetest-bewarethedark
+Beware the dark [bewarethedark]
+=================
+
 A Minetest mod where darkness simply kills you directly
+
+Version: 0.1.0
+
+License:
+  Code: LGPL 2.1 (see included LICENSE file)
+
+Report bugs or request help on the forum topic.
+
+Description
+-----------
+
+This is a mod for MineTest. It's only function is to make
+darkness and light a valid mechanic for the default minetest_game.
+In other voxel games, darkness is dangerous because it spawns
+monsters. In MineTest, darkness just makes it more likely for you
+to walk into a tree.
+
+This mod changes that in a very direct fashion: you are damaged
+by darkness, the darker the damager. So craft those torches!
+
+Current behavior
+----------------
+
+If you stand in a node with light level 7 or less, you slowly
+get damaged. The darker it is, the more damage you get per second.
+
+Future plans
+------------
+
+**Darkness meter**: similar to the standard air bar and drowning, add
+a meter for light, or sanity, or something loreful. You only start
+taking damage when the meter is depleted.
+
+**Sunburn**: Suddenly, too much light can kill you too! Will need
+a separate meter.
+
+Dependencies
+------------
+None at the moment.
+
+Installation
+------------
+
+Unzip the archive, rename the folder to to `bewarethedark` and
+place it in minetest/mods/
+
+(  Linux: If you have a linux system-wide installation place
+    it in ~/.minetest/mods/.  )
+
+(  If you only want this to be used in a single world, place
+    the folder in worldmods/ in your worlddirectory.  )
+
+For further information or help see:
+http://wiki.minetest.com/wiki/Installing_Mods
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..0470aad
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,106 @@
+--[[
+
+Beware the Dark [bewarethedark]
+==========================
+
+A mod where darkness simply kills you outright.
+
+Copyright (C) 2015 Ben Deutsch <ben@bendeutsch.de>
+
+License
+-------
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+USA
+
+]]
+
+
+bewarethedark = {
+
+    -- configuration
+    config = {
+        tick_time = 0.5,
+        damage_for_light = {
+            [15] = 0,
+            [14] = 0,
+            [13] = 0,
+            [12] = 0,
+            [11] = 0,
+            [10] = 0,
+            [ 9] = 0,
+            [ 8] = 0,
+            [ 7] = 0.1,
+            [ 6] = 0.25,
+            [ 5] = 0.5,
+            [ 4] = 1.0,
+            [ 3] = 1.5,
+            [ 2] = 2.0,
+            [ 1] = 2.5,
+            [ 0] = 3.0,
+        },
+    },
+
+    -- per-player-stash (not persistent)
+    players = {
+        --[[
+        name = {
+            pending_dmg = 0.0,
+        }
+        ]]
+    },
+
+    -- global things
+    time_next_tick = 0.0,
+}
+local M = bewarethedark
+local C = bewarethedark.config
+
+minetest.register_globalstep(function(dtime)
+
+    M.time_next_tick = M.time_next_tick - dtime
+    while M.time_next_tick < 0.0 do
+        M.time_next_tick = M.time_next_tick + C.tick_time
+        for _,player in ipairs(minetest.get_connected_players()) do
+            local name = player:get_player_name()
+            local pl = M.players[name]
+            if not pl then
+                M.players[name] = { pending_dmg = 0.0 }
+                pl = M.players[name]
+            end
+            local pos  = player:getpos()
+            local pos_y = pos.y
+            -- the middle of the block with the player's head
+            pos.y = math.floor(pos_y) + 1.5
+            local node = minetest.get_node(pos)
+
+            local light_now   = minetest.get_node_light(pos) or 0
+
+            local dps = C.damage_for_light[light_now]
+
+            pl.pending_dmg = pl.pending_dmg + (dps * C.tick_time)
+            --print("Standing in " .. node.name .. " at light " .. light_now .. " taking " .. dps .. " to " .. pl.pending_dmg);
+
+            if minetest.setting_getbool("enable_damage") then
+                if pl.pending_dmg > 0.0 then
+                    local dmg = math.floor(pl.pending_dmg)
+                    --print("Deals "..dmg.." damage!")
+                    pl.pending_dmg = pl.pending_dmg - dmg
+                    player:set_hp( player:get_hp() - dmg )
+                end
+            end
+        end
+    end
+end)