Notes: Cls does not clear sprites, and only clears one layer at a time. If you need to clear both layers, you will need to change the text plane between Cls calls.
Example:
SetTextPlane Scroll_A ' This is the default plane
Print "Hello"
SetTextPlane Scroll_B ' Change to plane b
Print "World"
SetTextPlane Scroll_A ' Back to plane a
Sleep 100
Cls
Sleep 100 ' Notice only "Hello" was cleared
SetTextPlane Scroll_B
Cls ' Get rid of "World"
