Difference: BoardSupportPackageWBfeather (26 vs. 27)

640 pwmprescale 
5 3 dmod   \ set D3 to PWM

: slowservo ( -- ) 
  begin
    100 50 do
      i 3 pwmpin! 
      50 osDelay drop
    1 +loop
    50 100 do
      i 3 pwmpin! 
      50 osDelay drop
    -1 +loop
  key? until 
  key drop
;