  We present a path-based design model and system for designing and creating
visualisations. Our model represents a systematic approach to constructing
visual representations of data or concepts following a predefined sequence of
steps. The initial step involves outlining the overall appearance of the
visualisation by creating a skeleton structure, referred to as a flowpath.
Subsequently, we specify objects, visual marks, properties, and appearance,
storing them in a gene. Lastly, we map data onto the flowpath, ensuring
suitable morphisms. Alternative designs are created by exchanging values in the
gene. For example, designs that share similar traits, are created by making
small incremental changes to the gene. Our design methodology fosters the
generation of diverse creative concepts, space-filling visualisations, and
traditional formats like bar charts, circular plots and pie charts. Through our
implementation we showcase the model in action. As an example application, we
integrate the output visualisations onto a smartwatch and visualisation
dashboards. In this article we (1) introduce, define and explain the path model
and discuss possibilities for its use, (2) present our implementation, results,
and evaluation, and (3) demonstrate and evaluate an application of its use on a
mobile watch.
