----listing 1----

' First stepper motor controller program 
' Rotates motor at set speed forever 

Symbol delay = B0  ' use b0 as the delay variable 
delay = 25         ' set the delay to 25 ms 

loop: high 0              ' turn on Q1 
      pause delay         ' wait 25 ms 
      low 0               ' turn off Q1 
      high 1              ' turn on Q2 
      pause delay         ' wait 25 ms 
      low 1               ' turn off Q2 
      high 2              ' turn on Q3 
      pause delay         ' wait 25 ms 
      low 2               ' turn off Q3 
      high 3              ' turn on Q4 
      pause delay         ' wait 25 ms 
      low 3               ' turn off Q4 
      goto loop           ' forever 

----listing 1----