diff --git a/typeface.py b/typeface.py
index 0e517e7..10d3bc6 100644
--- a/typeface.py
+++ b/typeface.py
@@ -83,7 +83,7 @@ def draw_letter_l(unit):
     left(90)
     forward(8*unit)
     left(90)
-    
+
 
 def draw_letter_m(unit):
     pass
@@ -92,7 +92,23 @@ def draw_letter_n(unit):
     pass
 
 def draw_letter_o(unit):
-    pass
+    penup()
+    forward(4*unit)
+    pendown()
+    circle(4*unit)
+    penup()
+    left(90)
+    forward(2*unit)
+    right(90)
+    pendown()
+    circle(2*unit)
+    penup()
+    backward(4*unit)
+    right(90)
+    forward(2*unit)
+    pendown()
+    left(90)
+
 
 def draw_letter_p(unit):
     pass