The present invention consists of a method comprising the steps of displaying an image representing a source value; displaying an image representing a destination value; and displaying a transition image; wherein the transition image is a function of the source value and the destination value. During manufacturer-side calibration, a point source is imaged by the nuclear camera and a PSF therefor is measured. The integrated modulator chip is coupled and secured to the integrated time-delay chip via a suitable optical index-matching layer or collimating lenses. The system can provide a business based on, for example, providing system, access, charitable fund management, and charitable donation transaction fees. The trenching wheel is mounted so that it can pivot about an axis orthogonal to the chassis so as to occupy a working position projecting from the chassis and a transport position brought up onto the chassis.