diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e33609d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.png
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f55f728
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+all: ucloud-networking.png ucloud-vm-states.png
+
+%.png: %.dot
+	echo dot -Tpng < $< > $@
diff --git a/ucloud-ipv6-networks.dot b/ucloud-ipv6-networks.dot
new file mode 100644
index 0000000..f0cca40
--- /dev/null
+++ b/ucloud-ipv6-networks.dot
@@ -0,0 +1,9 @@
+digraph G {
+    ucloud_api [shape=box];
+    ucloud_router [shape=box];
+    ucloud_nat64 [shape=box];
+
+    ucloud_api -> REQUEST_SLASH_64 [label="Requested by user" style="dotted"];
+    ucloud_router ->  HAS_SLASH_64 [label="Requested by user" style="dotted"];
+
+}