Various methods of programming a processing system utilizing a computer having a configuration canvas, at least one processor, and a plurality of function objects is disclosed. A processing configuration is created by placing object icons associated with function objects onto the canvas. Execution paths are automatically routed between the object icons based on orientations of icons on the canvas. Data flow paths are created between object icons on the canvas separately from the routings of the execution paths. Execution paths can be re-routed to increase the versatility of the processing system. Also, visual instruments and instrument icons can be utilized to further graphically illustrate and control the processing configuration.