diff --git a/examples/accellog.py b/examples/accellog.py
index b1f289f8ad..a2fbe1437d 100644
--- a/examples/accellog.py
+++ b/examples/accellog.py
@@ -5,10 +5,13 @@ import pyb
 accel = pyb.Accel()                                 # create object of accelerometer
 blue = pyb.LED(4)                                   # create object of blue LED
 
-log = open('/sd/log.csv', 'w')                      # open file to write data - /sd/ is the SD-card, /flash/ the internal memory
+# open file to write data - /sd/ is the SD-card, /flash/ the internal memory
+log = open('/sd/log.csv', 'w')
+
 blue.on()                                           # turn on blue LED
 
-for i in range(100):                                # do 100 times (if the board is connected via USB, you can't write longer because the PC tries to open the filesystem which messes up your file.)
+# do 100 times (if the board is connected via USB, you can't write longer because the PC tries to open the filesystem which messes up your file.)
+for i in range(100):
         t = pyb.millis()                            # get time since reset
         x, y, z = accel.filtered_xyz()              # get acceleration data
         log.write('{},{},{},{}\n'.format(t,x,y,z))  # write data to file