diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..443f2e5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+cmake-*
+build/
+.idea/
+!.idea/cmake.xml
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9e87c24
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "extern/glfw"]
+	path = external/glfw
+	url = https://github.com/glfw/glfw.git
+[submodule "extern/spdlog"]
+	path = external/spdlog
+	url = https://github.com/gabime/spdlog.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..cde0bea
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.19 FATAL_ERROR)
+project(BillySheet)
+
+add_executable(BillySheet src/main.cpp)
+
+set_target_properties(BillySheet PROPERTIES
+					  CXX_STANDARD 17
+					  CXX_STANDARD_REQUIRED ON
+					  CXX_EXTENSIONS OFF
+					  INTERPROCEDURAL_OPTIMIZATION ON
+					  UNITY_BUILD ON)
diff --git a/README.md b/README.md
index 112c975..48b338e 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
-# BillySheet
+# Billy sheet control
+This project is about to digitally control your character sheet from the book "La Forteresse du Chaudron Noir" from Bob Lennon.
 
-Character sheet for Billy from "La Forteresse du Chaudron Noir" from Bob Lennon
\ No newline at end of file
+## External dependencies
+All dependencies are inside the "external" directory. The followings are inside:
+- GLFW: windowing
+- Spdlog: logging the app.
diff --git a/external/glfw b/external/glfw
new file mode 160000
index 0000000..7d5a16c
--- /dev/null
+++ b/external/glfw
@@ -0,0 +1 @@
+Subproject commit 7d5a16ce714f0b5f4efa3262de22e4d948851525
diff --git a/external/spdlog b/external/spdlog
new file mode 160000
index 0000000..eb32206
--- /dev/null
+++ b/external/spdlog
@@ -0,0 +1 @@
+Subproject commit eb3220622e73a4889eee355ffa37972b3cac3df5
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..ec3351e
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+	std::cout << "Hello, World!" << std::endl;
+	return EXIT_SUCCESS;
+}