diff --git a/README.md b/README.md
index 57babd8..25204a8 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,21 @@
 # digiline_nodes
 API to add digiline nodes
+## Code License
+    Copyright (C) 2021 Cato Yiu and other contributers
+
+    This program 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 program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+
+P.S: for a full list of contributer list, see:
+* https://gitlab.com/yw05/digistuff/-/commits/master/
+* https://github.com/C-C-Minetest-Server/digiline_nodes/commits/main
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..17e06a7
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,64 @@
+--[[
+This file is a part of digiline_nodes.
+
+Copyright (C) 2021 Cato Yiu and other contributers
+
+This program 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 program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+]]
+local MN = minetest.get_current_modname()
+local MP = minetest.get_modpath(MN)
+local S = minetest.get_translator(MN)
+digiline_nodes = {}
+local _dn = digiline_nodes
+function _dn.register_digiline_node(mod,node)
+  local nodename = mod .. ":" .. node
+  local digi_nodename = MN .. ":" .. mod .. "__" .. node
+  local ndef = minetest.registered_nodes[nodename]
+  if not(ndef) then
+    minetest.log("warning","Not registering `" .. nodename ..
+      "`'s digiline node since it does not exist")
+    return
+  end
+  local digi_ndef = table.copy(ndef)
+  digi_ndef.description = S("Digiline Condused @1",ndef.description or nodename)
+  if ndef.long_description then
+    digi_ndef.long_description = S("Digiline condused version of @1",ndef.long_description)
+  end
+  digi_ndef.digiline = {
+    wire = {
+      rules = {
+        {x = 1, y = 0, z = 0},
+        {x =-1, y = 0, z = 0},
+        {x = 0, y = 1, z = 0},
+        {x = 0, y =-1, z = 0},
+        {x = 0, y = 0, z = 1},
+        {x = 0, y = 0, z =-1}
+      }
+    }
+  }
+  digi_ndef.is_ground_content = false
+  if not digi_ndef.group then digi_ndef.group = {} end
+  digi_ndef.group.digiline_node = 1
+  minetest.register_node(digi_nodename,digi_ndef)
+end
+
+local domod = function(mn)
+  dofile(MP .. "/mods/" .. mn .. ".lua")
+end
+if minetest.get_modpath("default") then
+  domod("default")
+end
+if minetest.get_modpath("ethereal") then
+  domod("ethereal")
+end
diff --git a/mod.conf b/mod.conf
new file mode 100644
index 0000000..f600378
--- /dev/null
+++ b/mod.conf
@@ -0,0 +1,4 @@
+name = digiline_nodes
+destription = API to add digiline nodes
+depends = digilines
+optional_depends = default, ethereal
diff --git a/mods/default.lua b/mods/default.lua
new file mode 100644
index 0000000..4e8c558
--- /dev/null
+++ b/mods/default.lua
@@ -0,0 +1,30 @@
+--[[
+This file is a part of digiline_nodes.
+
+Copyright (C) 2021 Cato Yiu and other contributers
+
+This program 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 program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+]]
+local function reg(node)
+  digiline_nodes.register_digiline_node("default",node)
+end
+
+reg("stone")
+reg("cobbe")
+reg("stonebrick")
+reg("stone_block")
+reg("sandstone")
+reg("desert_sandstone")
+reg("silver_sandstone")
+reg("meselamp")
diff --git a/mods/ethereal.lua b/mods/ethereal.lua
new file mode 100644
index 0000000..1eb4532
--- /dev/null
+++ b/mods/ethereal.lua
@@ -0,0 +1,23 @@
+--[[
+This file is a part of digiline_nodes.
+
+Copyright (C) 2021 Cato Yiu and other contributers
+
+This program 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 program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+]]
+local function reg(node)
+  digiline_nodes.register_digiline_node("ethereal",node)
+end
+
+reg("crystal_block")
diff --git a/test.lua b/test.lua
new file mode 100644
index 0000000..27fc2d2
--- /dev/null
+++ b/test.lua
@@ -0,0 +1,18 @@
+--[[
+This file is a part of digiline_nodes.
+
+Copyright (C) 2021 Cato Yiu and other contributers
+
+This program 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 program 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 program.  If not, see <https://www.gnu.org/licenses/>.
+]]