Sikuli Tutorial - Detect any activity in monitor

This script is used if we want to detect if any activity(ies) happen in monitor using Sikuli. The idea is simple:
1. Capture the screen,
2. Take another capture after certain time interval
3. Compare the second capture to the first
4. Delete temporary image

Here is the script (I use python script)

def activityDetected():
    screen = Screen()
    while True:
        file = screen.capture(screen.getBounds())
        sleep(2)
        file2 = screen.capture(screen.getBounds())
        f = Finder(file)
        f.find(Pattern(file2).exact())
        matchVal = f.hasNext() 

        f.destroy()
        
        os.remove(file)
        os.remove(file2)
        if matchVal:
            return False
        else:
            return True

Hope this helps you.