+ - [ ] turn off clear motor battery pack, 4xAA
+ - [ ] turn off black 9v battery pack
+* g_follow
+ - [ ] locate materials
+ - [ ] challenge-bot, laptop, usb cable
+ - [ ] connect arduino and computer with usb cable
+ - [ ] on laptop, in arduino, open g_follow sketch
+ - [ ] close other arduino windows
+ - [ ] control+u to upload
+ - [ ] wait for g_follow to finish uploading
+ - [ ] unplug usb cable
+ - [ ] turn on clear motor battery pack
+ - [ ] turn on black arduino battery pack
+ - [ ] check wheel spin controlled by sonars
+ - [ ] check left wheel and left sonar
+ - [ ] move hand closer to left sonar
+ - [ ] check that left wheel initially rolls forwards, stops, and
+ then backwards, as your hand gets closer to the left sonar
+ - [ ] check right wheel and right sonar
+ - [ ] move hand closer to right sonar
+ - [ ] check that right wheel initially rolls forwards, stops, and
+ then backwards, as your hand gets closer to the right sonar
+ - [ ] set challenge-bot down on wheels
+ - [ ] use hands in front of the robot's sonar sensors and check if
+ you can control how the robot rolls around
+ - [ ] turn off clear motor battery pack
+ - [ ] turn off black 9v battery pack
+* h_stay_on_table
+ - [ ] locate materials
+ - [ ] challenge-bot, laptop, usb cable
+ - [ ] connect arduino and computer with usb cable
+ - [ ] on laptop, in arduino, open h_stay_on_table sketch
+ - [ ] close other arduino windows
+ - [ ] upload with control+u
+ - [ ] wait for upload to finish
+ - [ ] unplug usb cable
+ - [ ] turn on clear motor battery pack
+ - [ ] turn on black arduino battery pack
+ - [ ] set robot down on a its box or a table
+ - [ ] check that robot stays on the table
+ - [ ] check if robot can roll off an edge at a shallow angle
+ - [ ] if it does, check if you can change the placement of the
+ sonars to detect approaching an edge from a shallow angle.
+ - [ ] turn off clear motor battery pack
+ - [ ] turn off black arduino battery pack