Here's a very crude script for random Maya effects.
It just configures the Maya screensaver via mouseclicks and keypresses and runs it.
To use it, download AutoHotkey from
www.autohotkey.com, install it, save the script below to Maya.ahk, rightclick it and choose Compile script, rename the created Maya.exe to Maya.scr, copy it to C:\Windows\System32 and choose it as the default screensaver in the control panel.
Edit: Removed clipboard usage.
Skrommel
;Maya.ahk
SetWinDelay,100
SetKeyDelay,0
Run,C:\WINDOWS\system32\Maya Paint Effects.SCR /c
WinWait,Maya Paint Effects Setup
WinActivate,Maya Paint Effects Setup
WinWaitActive,Maya Paint Effects Setup
MouseClick,Left,55,45
CHOOSE:
Random,random,1,50
If random=29
Goto,CHOOSE
Send,{Down %random%}{Right}
Random,random,1,50
Send,{Down %random%}{Enter}
WinWaitActive,Maya Paint Effects Setup
Send,{Enter}
command="C:\WINDOWS\system32\Maya Paint Effects.SCR" /s
Send,#r
Sleep,500
Send,%command%{Enter}