this information on the adafruit page is wrong
To control with an Arduino, we suggest connecting the white control wire to pin 9 or 10 and using the Servo library included with the Arduino IDE (see here for an example sketch). Position "0" (1.5ms pulse) is stop, "90" (2ms pulse) is full speed forward, "-90" (1ms pulse) is full speed backwards
0 is full speed in one direction, 179 is full speed in the other, 90 (plus or minus a few degrees depending on the servo) is stopped.
I think I changed the map to 0 to 360 instead of the 1 to 179.
thats not correct, change it back the way it was.
Then try slowly moving the pot and see if you can control the direction and speed
You do