[TubaMorg]

Are you talking about the driver station console? If so it is treated analogous to the LCD screen of last year which means you are essentially "painting" characters on the screen. To delete characters you have to output a space at that position.

Example:

"here is some text"
to just say 'here' you would have to output
"here "
to erase the entire line:
" "

So for your thing instead of backspace:
"|"
" "
"\"
" "
"-"
" "
"|"
etc.....

Also keep in mind that an update signal must be sent each time the LCD text is set or it won't appear animated.

If I am totally misunderstanding what you are trying to do...apologies!
You can try a unicode backspace too: \u0008