same code example as u wanted but without the comments is

Code:
 DEFINE OSC 8             ' Timing referance for pause , pauseus commands
 H9 var PORTB.0            ' Port B.0 is output pin digital TTL 

H9 = 0                           ' Set output to low on startup can remove and assume it 0 to start but hey
Main:
H9 =1   :pause 10 :H9=0: pause 10
goto main