Epson EX-1000 User Manual page 69

The numbers for the second line were calculated in the same way
Once the numbers for the pin patterns are calculated, they are put in
the program in DATA statements, separated by commas.
The program works in a similar way to the last example. This time it
selects 7/72-inch line spacing because only seven pins are used.
Because the data is not repetitive, each column of graphics data is read
from the DATA statements and sent to the printer. The design is 41 dot
positions wide. Therefore both lines 130 and 140 use the number 41.
When you run this program, it produces the following printout:
If you want to see the figure in other densities, change the Y in line
130 to LorZ.
6-12
Graphics and User-defined Characters