If you are near the equator, you might try a larger gnomon than the default. For mid to large latitudes a value of 0.5 inches is highly recommended. The value entered is in inches. These labels indicate the time that each line represents. The format is postscript as indicated by the .ps ending.
Postscript is a language used by many printers to print documents.
Unfortunately few image viewers understand postscript, and as a consequence will not display the template. Perhaps some time in the future, I will offer a choice between the GIF or postscript format. For the meantime I can only direct you to a ghostscript viewer . I make no claims on the accuracy of the sundial, or that the code is free of errors. However, I have used the sundial generated by this program many times, and can reliably tell what time it is to within about 5 minutes.