Sure! Here is my program, which uses the home screen (although the same ideas apply to the graph screen). It will run until you press any key.
ClrHome
randInt(2,12→X
randInt(2,7→Y
1-2randInt(0,1→A
1-2randInt(0,1→B
Repeat K
getKey→K
If max(X={1,13
A→A
If max(Y={1,8
B→B
Output(Y,X,"
X+A→X
Y+B→Y
Output(Y,X,"TI84
rand(25
End
ClrHome
It displays "TI84" as the logo, but you could change that to say whatever you want. You might have to change the numbers for the borders to make it look right, though. And the "rand(25" makes the calculator wait half a second in between each movement, which you could mess with to make it run faster or slower.
