the trick was so simple lolz...
reveal the trick: (If you want to figure out the trick by yourself then don't click this)
[spoiler]
First I thought that maybe my monitor can see what I'm looking (LoL - that would require advance technology)
then i notice that every time the flash reset, the symbol for each numbers also changes. then I tried computing two different digits then it shows same result. tried computing another different digits and still same result.
All result will show same symbols.. <-- thats the trick..
[/spoiler]