diff --git a/clock_pillow.py b/clock_pillow.py
index 24633c9..f054d66 100644
--- a/clock_pillow.py
+++ b/clock_pillow.py
@@ -5,6 +5,8 @@ from PIL import Image
 from PIL import ImageDraw
 from PIL import ImageFont
 
+mirror = False
+
 
 def rgb(r=0, g=None, b=None):
     if g == None:
@@ -19,6 +21,8 @@ def rrc(tuple, center, angle):
     cos = math.cos(angle)
     tpl = (tuple[0] - center[0], tuple[1] - center[1])
     tpl = tuple
+    if mirror:
+        cos = -cos
     return (int(tpl[0] * sin + tpl[1] * cos + center[0]), int(-tpl[0] * cos + tpl[1] * sin + center[1]))
 
 
diff --git a/main.py b/main.py
index 49ba29b..199db1d 100644
--- a/main.py
+++ b/main.py
@@ -4,6 +4,7 @@ import time
 
 
 def main():
+    clock_pillow.mirror = True
     fb = Framebuffer(device_no=0)
     while True:
         img = clock_pillow.draw_clock(pixelformat="RGBA", aliasing=None)