Line Style Definitions
Line style definitions are defined by pairs of on/off transitions in the following format:
You can specify any number of on/off transitions as long as, for every on transition, there is a corresponding off transition. The transitions can be integer or real values and specify a distance in user-defined units. For example, if you specify in the design script that the units are millimeters (mm), the line style definition 3, 1.5, 5, 1.5 indicates a dash 3 mm long, a space of 1.5 mm, a 5 mm dash followed by a 1.5 mm space.
(1.5, 1, 1.5, 0.5)