diff --git a/default_mod/init.lua b/default_mod/init.lua
index 564cdef..4bf9fc4 100644
--- a/default_mod/init.lua
+++ b/default_mod/init.lua
@@ -1,35 +1,57 @@
 -- twi_mods/default_mod/init.lua
 -- modification of default
 --[[
     Copyright (C) 2010-2012  celeron55, Perttu Ahola <celeron55@gmail.com>
     Copyright (C) 2024  1F616EMO
     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
 ]]
 
 -- Coral group
 for _, name in ipairs({
     "default:coral_green",
     "default:coral_pink",
     "default:coral_cyan",
     "default:coral_brown",
     "default:coral_orange",
     -- "default:coral_skeleton",
 }) do
     local groups = table.copy(minetest.registered_nodes[name].groups or {})
     groups.coral = 1
     minetest.override_item(name, {
         groups = groups
     })
 end
+
+-- Spread default:dry_dirt_with_dry_grass to default:dry_dirt
+minetest.register_abm({
+    label = "Dry Grass Dirt spread",
+    nodenames = { "default:dry_dirt" },
+    neighbors = {
+        "default:dry_dirt_with_dry_grass",
+    },
+    interval = 6,
+    chance = 50,
+    catch_up = false,
+    action = function(pos, node)
+        -- Check for darkness: night, shadow or under a light-blocking node
+        -- Returns if ignore above
+        local above = { x = pos.x, y = pos.y + 1, z = pos.z }
+        if (minetest.get_node_light(above) or 0) < 13 then
+            return
+        end
+
+        minetest.set_node(pos, { name = "default:dry_dirt_with_dry_grass" })
+    end
+})