Each position on the display has a number for an "address".
Code:
Row1  CON 128 = $80
Row2  CON 192 = $C0
Row3  CON 148 = $90
Row4  CON 212 = $D0
'All first position on each of the lines
By adding to the constant you can place the character anyplace you want on the display.
First line third position from the left would be
$83 or 131

Setup a loop adding to the constant and see if you can make something scroll.