An autonomous truck loading system can have a database that stores a plurality of elementary behaviors for various phases of a process of loading the autonomous truck by the one or more loaders. The stored elementary behaviors can include predetermined maneuvers for the autonomous truck, sensing behaviors; and logic behaviors. An operator can select multiple ones of the stored behaviors via user interface. A controller can assemble the selected behaviors together into an operation script for loading of the autonomous truck by a loader. The controller can control the autonomous truck to perform the operation script.