diff --git a/012-CLI/.gitignore b/012-CLI/.gitignore
new file mode 100644
index 0000000..e33609d
--- /dev/null
+++ b/012-CLI/.gitignore
@@ -0,0 +1 @@
+*.png
diff --git a/012-CLI/Makefile b/012-CLI/Makefile
new file mode 100644
index 0000000..f85ea40
--- /dev/null
+++ b/012-CLI/Makefile
@@ -0,0 +1,14 @@
+OPENSCAD=openscad
+
+SCAD=$(wildcard *.scad)
+PNG=$(SCAD:.scad=.png)
+
+all: $(PNG)
+clean:
+	@rm -f *.png
+
+%.png: %.scad
+	$(OPENSCAD) -o $@ --render $<
+
+
+.PHONY: all clean
diff --git a/012-CLI/test.scad b/012-CLI/test.scad
new file mode 100644
index 0000000..9981b06
--- /dev/null
+++ b/012-CLI/test.scad
@@ -0,0 +1 @@
+cube(10,10,center=true);