Bubbles will come out of your mouse cursor. Adjust the "Bubble Delay slider to control the time interval between the times when bubbles come out. Set "Color" to "On" for multicolored bubbles. Note: When colors are set to "on", the program will start to lag on slower computers.
This is the same bubble engine used in http://scratch.mit.edu/projects/31426356/ Feel free to use this engine for your own projects.