+ - [ ] turn off the motor battery pack
+ - [ ] unplug usb cable from challenge-bot
+* e_both_motors
+ - [ ] unplug usb cable from challenge-bot, if it is still plugged in
+ - [ ] locate materials
+ - [ ] challenge-bot, laptop, usb cable
+ - [ ] 2x 35mm stiff black wire, solid core 22 AWG
+ - [ ] 1x 120mm stiff white wire, solid core 22 AWG
+ - [ ] 1x 120mm stiff orange wire, solid core 22 AWG
+ - [ ] 1x 120mm stiff blue wire, solid core 22 AWG
+ - [ ] on laptop, in fritzing, open
+ build-stages/e_both_motors/both-motors.fzz
+ - [ ] hook up short wires first
+ - [ ] with 35mm black wires, hook black chip's middle 2 pins on the
+ forward side of the chip to the breadboard's blue rail. these
+ middle pins on the chip's forward side are pins 12 and 13
+ - [ ] hook up motor wires
+ - [ ] hook yellow wire to motor controller's pins to the left
+ of the center grounded pins. this is the chip's pin 14.
+ - [ ] hook green wire to motor controller's pins to the right
+ of the center grounded pins. this is the chip's pin 11.
+ - [ ] connect motor controller and arduino
+ - [ ] with 120mm white wire, connect arduino digital pin 5 to
+ motor controller's forward right pin, the chip's pin 9.
+ - [ ] with 120mm orange wire, connect arduino digital pin 4 to
+ motor controller's forward second-to-left pin between red
+ and yellow connected pins. this is the chip's pin 15.
+ - [ ] with 120mm blue wire, connect arduino digital pin 3 to
+ motor controller's pin forward second-to-left pin between
+ green and white pins. this is the chip's pin 10.
+ - [ ] turn battery pack on
+ - [ ] check that both motors spin forwards
+ - [ ] turn off the motor battery pack