The nested DRAW statements
within a BEGINPOLYLINE block specify a series of points for a polyline.
Each DRAW statement draws a straight line from the previous point
to the endpoint that is specified in the DRAW statement's X and Y
arguments. The first DRAW statement starts its line from the X,Y point
that is specified in the BEGINPOLYLINE statement. You can specify
as many DRAW statements as needed to complete the polyline.
Each DRAW statement
uses the following general syntax: