Thanks for comment!Yep as u said,it's more readable with XY,however the reason I use XZ is that for the Input 'X' and 'Z' is in the adjecent position(I used XY in program too XD. Your advice is very useful and I will take into consideration!Maybe using a custom key bindings to XY is more readable?Will do it a fuller demo after more learning.Wish you a nice day!:D