ASM question ?

Projects Programming
1

I have been working on learning ASM and Im just NOT doing very well I have been trying to write a simple
Blink program and i am seeing NOTHING here is my program can anyone tell me what Im doing Wrong
Im expecting about a 20HZ blink.. not exactly but close. All i get is darkness

.NOLIST
.INCLUDE "tn13def.inc"
.LIST
.ORG 0


.equ Count16 = 60000 
sbi DDRB,DDB0 
	
MAIN:
	cbi PORTB,PORTB0
	ldi R25,HIGH(Count16) 
	ldi R24, LOW(Count16) 
	
Loop16:
   
	sbiw R24,1 
	brne Loop16 
	sbi PORTB,PORTB0

	RJMP MAIN
2

I don't know anything about assembly but this might be helpful:
https://forum.arduino.cc/index.php?topic=413151.msg2844634#msg2844634

3

Delay from cbi to sbi = 60000 loops.
Delay from sbi to cbi = how much?

Hint: writing ones to PINB register toggles the corresponding bits in PORTB.

4

should be about 50ms am i wrong i know it will not be exact because all the instructions take cycles also

5

I mean 20ms

6

There is just one rjmp between the execution of sbi and cbi. It does not take 20 ms.

7

well how long will it take ?approximately

8

i am not looking for someone to write code for me i really want to learn this

9

Unroll the loop (in a text editor or on paper).

Next to each section / instruction jot down roughly how long it takes to execute.

10

is my 16 bit loop write ?