PBASIC

 DO  
   HIGH 1               'turn LED in pin 1 on
   PAUSE 1000           'keep it on for 1 second
   LOW 1                'turn it off
   PAUSE 500            'keep it off for ½ second
 LOOP                   'repeat forever

 counter VAR Byte       'sets variable "counter 
 For counter = 1 to 5 
   High 1                 'turn LED in pin 1 on
   Pause 1000             'keep it on for 1 second
   Low 1                  'turn it off
   pause 500              'keep it off for ½ second                        
 Next                   'redirects to beginning four more times
 END