diff --git a/render.py b/render.py
new file mode 100644
index 0000000..4d139cb
--- /dev/null
+++ b/render.py
@@ -0,0 +1,37 @@
+import os
+import sys
+import shutil
+import openscad
+
+class RENDER:
+    def __init__(self):
+        self.count = 1
+        self.vitamins = {}
+        self.printed = {}
+        self.assemblies = {}
+
+    def add_part(self, s):
+        if s[-4:] == ".stl":
+            parts = self.printed
+        else:
+            parts = self.vitamins
+        if s in parts:
+            parts[s] += 1
+        else:
+            parts[s] = 1
+
+    def add_assembly(self, ass):
+        if ass in self.assemblies:
+            self.assemblies[ass].count += 1
+        else:
+            self.assemblies[ass] = RENDER()
+
+def render(machine):
+    bom_dir = machine + "/render"
+
+if __name__ == '__main__':
+    if len(sys.argv) > 1:
+        render(sys.argv[1])
+    else:
+        print "usage: bom [mendel|sturdy|your_machine]"
+        sys.exit(1)