titleCut ["BLACK OUT",0.001]
titleText ["Line 1","PLAIN"]
~10
titleText ["Line 2","PLAIN"]
titleCut ["BLACK IN",5]
there, that code will keep it black, write out "Line 1" on the screen, wait 10 seconds, then write "Line 2" on the screen. In the center of the screen, if you want to have the text at the bottom of the screen, you put:
"PLAIN DOWN" instead of "PLAIN".
That should just about cover it.