My apologies for the delay in providing this corrected pattern:
;%VERSION=3.0
;%UNITS=MM
*160x240+3
;%TYPE=MODEL
180,0,0,163,121.5,160,-166
90,-160,0,-121.5,-163,240,-3
0,-160,240,163,121.5,160,-166
-90,0,240,-121.5,-163,240,-3
The pattern has four grids as it is arranged with offsets set at angles to place the tile repetitions naturally.
Patterns built with orthogonal offsets typically require more definition lines to complete the pattern as demonstrated by patterns created with generators requiring the pattern sample to be built within a rectangle.
This, the earlier pyrevit pattern from martijn.pater as extracted from the .rvt file contains 10 grids.
;;*************************************************
;%VERSION=3.0
;%UNITS=MM
;;*************************************************
*Tiles 160x240mm-3mm gap,HatchKit Fill Manager
;%TYPE=MODEL
;;*************************************************
0,0,0,0,-243,160,-166
90,0,0,0,326,240,-3
180,160,240,0,243,160,-166
90,160,0,0,326,240,-3
0,163,121.5,0,-243,160,-166
90,323,121.5,0,326,121.5,-121.5
90,163,0,0,326,118.5,-124.5
180,323,118.5,0,243,160,-166
90,323,0,0,326,118.5,-124.5
90,163,121.5,0,326,121.5,-121.5
hth,
Hugh Adamson