diff --git a/apple410/__init__.py b/apple410/__init__.py
index 58cffe5..1404c00 100755
--- a/apple410/__init__.py
+++ b/apple410/__init__.py
@@ -1,6 +1,13 @@
 #!/usr/bin/python3
 import serial
 import time
+from plot_to_svg import Plotter
+
+def plot_to_svg(instream, outstream):
+    "Convert a set of plot instructions to an SVG. Works mininmally."
+    p = Plotter()
+    p.read(instream)
+    p.write(outstream)
 
 class Apple410:
     """A simple class for queing up commands for the Apple 410"""
diff --git a/apple410/plot_to_svg.py b/apple410/plot_to_svg.py
index 861f426..eb35c02 100755
--- a/apple410/plot_to_svg.py
+++ b/apple410/plot_to_svg.py
@@ -158,10 +158,13 @@ class Plotter:
         except AttributeError:
             sys.stderr.write("Unrecognized command code {}\n".format(cmd_code))
 
-p = Plotter()
+    def read(self,inf):
+        for line in inf.readlines():
+            line = line.strip()
+            p.process_cmd(line)
 
-for line in sys.stdin.readlines():
-    line = line.strip()
-    p.process_cmd(line)
+if __name__=='__main__':
+    p = Plotter()
+    p.read(sys.stdin)
+    p.write(sys.stdout)
 
-p.write(sys.stdout)