.include "m32def.inc"
    sbi  ddrb,3
  begin:ldi  r20,69    
    out  ocr0,r20  
    ldi  r20,0x19  
    out  tccr0,r20  
  l1:  in  r20,tifr  
    sbrs  r20,ocf0  
    rjmp  l1
    ldi  r16,1<<ocf0  
    out  tifr,r16
    ldi  r20,99    
    out   ocr0,r20  
    ldi  r20,0x29  
    out  tccr0,r20  
  l2:  in  r20,tifr  
    sbrs  r20,ocf0  
    rjmp  l2
    ldi  r16,1<<ocf0 
    out  tifr,r16
    rjmp  begin