diff --git a/app.py b/app.py
index 3d3ad1a..721d204 100755
--- a/app.py
+++ b/app.py
@@ -5,12 +5,12 @@ import rtmidi
 midiout = rtmidi.MidiOut()
 available_ports = midiout.get_ports()
 
-midiout.open_port(0)
-midiout.send_message([0xB0, 1, 127])
-# for i, port in enumerate(available_ports):
-    # print(port)
-    # if "IAC Driver" in port:
-        # midiout.open_port(i)
+i = 0
+for port in available_ports:
+    if "IAC Driver" in port:
+        midiout.open_port(i)
+        break
+    i+=1
 
 def get_screen_size():
     screen = NSScreen.mainScreen()
@@ -22,8 +22,8 @@ def get_screen_size():
 
 def on_move(x, y):
     w, h = get_screen_size()
-    print(128*x/w)
-    print(128*y/h)
+    midiout.send_message([0xB0, 16, 127-(127*y/h)])
+    midiout.send_message([0xB0, 17, 127*x/w])
 
-# with mouse.Listener(on_move=on_move) as listener:
-    # listener.join()
+with mouse.Listener(on_move=on_move) as listener:
+    listener.join()