There's still a few things that may not work properly. If you walk away, the HUD will still be showing, once you add money to the bank, you won't be able to add any more again. This should fix that:
;Artificial Intelligence Script
;Header
desc = banker
;Triggers
:state=0:hudreset,hudx=50,hudy=80,hudimagefine=videobank/banker.png,hudname=banker,hudhide=1,hudmake=display,state=1
:state=1,plrdistwithin=60:rotatetoplr,lookatplr,hudshow=banker,state=2
:state=2,scancodekeypressed=21:hudfadeout=banker,state=3
:state=2,plrdistfurther=60:hudfadeout=banker,state=1
:state=2,scancodekeypressed=49:hudfadeout=banker,state=1
:state=3:addbankfromuser,state=1
;End Of Script
3DS friend code: 0044-2895-5474