define wiring in separate file
[challenge-bot] / build-stages /
drwxr-xr-x   ..
drwxr-xr-x - a_serial
drwxr-xr-x - b_left_sonar
drwxr-xr-x - c_both_sonars
drwxr-xr-x - d_left_motor
drwxr-xr-x - e_both_motors
drwxr-xr-x - f_untethered
drwxr-xr-x - g_follow
drwxr-xr-x - h_stay_on_table
drwxr-xr-x - i_follow_on_table