diff --git a/.gitignore b/.gitignore
index 15d0a56..3180215 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 .venv/
 build/
 *.png
+*.svg
 *.so
 *.c
 skydome.c
diff --git a/diagram.d2 b/diagram.d2
new file mode 100644
index 0000000..fa87dfa
--- /dev/null
+++ b/diagram.d2
@@ -0,0 +1,24 @@
+direction: down
+
+Map Window: {
+    Choose Location
+}
+
+Map Window -> Options Window
+Options Window: {
+    Choose Environment
+    Optional :{
+        Choose Pressure
+        Choose Temperature
+        }
+}
+
+Options Window -> Image Window
+Image Window: {
+    Press "render"
+    Optional :{
+        Zoom In/Out
+        Change Rendering Mode
+        }
+}
+