Using the 2d Text command --- Text x,y,"your string..." , the horizontal position "x" and vertical "y" has to be an integer. A simple loop would allow it to scroll from bottom to top. But I think you want to set it up in a text box. Viewport x,y,width,height -allows you to define a rectangle that plain text will be visible in. Rect can make a colored background and Color can set the text color.
In general, I suggest looking at the 2d text commands.
In general, I suggest looking at the 2d text commands.