Scripting is a programming technique in which applications are built by composing specially designed, pre-packaged software components. Depending on the kind of applications different types of components and ways of composing them will be used. Hence, we distinguish between scripting models, defining the allowed components and kinds of connections between them, and scripting tools, helping to build scripts in accordance to the underlying model. We describe the implementation of the Visual Scripting Tool VST which supports the construction of scripts through the interactive editing of scripts' visual counterparts. The current version of the VST supports the UNIX shell scripting model. Extensions to VST supporting different scripting models are discussed.