(define todo
;; list of specific things to do for challenge-bot class
(list
+ "Separate openscad into drawing and data files"
(list "programming guide to the challenge"
(list
"experiments and self test 2 page 4 of 15"
"remove \"forward_speed\" and \"stop_speed\" from g_follow"
"video should show motor doesn't react to hand for left motor"
"make a case for the 9v and 6v battery holders"
+ "make new stickers from new qr code"
(string-append "order these: http://www.ebay.com/itm/"
"100-x-Ultrasonic-Module-HC-SR04-Distance-Measuring"
"-Transducer-Sensor-for-Arduino-/"