Scan Barcode in move one to the right (A1-B1), Then down (A2-B2) without changing direction... code maybe??

[irrefutable14]

I'm a novice to excel. I found the code somewhere on the web and it works halfway.
This is what I need this sheet to do. When I scan a asset code in A1, I need it to go to B2
Then down to the next row A2 and over to B2 etc... If there is an error I'd like to delete it without the code shooting an error.
I cant change the direction as though I have 5 sheets to scan on and this sheet is the only one I need to move in that particular direction. Could you help??