A different Javascript novice with no idea what is going wrong

[SuperiorSamWise]

This is basically the first time I've used the command line, so this issue is almost definitely my fault. I think I've installed pictoprime and its dependencies properly but when I run it to try and get a prime for the Matt headshot (or any other image) it doesn't look like the image and isn't all in digits. I have tried using pictoprime --pixels '7772299408' (with different ',", and without) but it only returns
Error: Either a number or an image must be specified.
at main (file:///C:/Users/Lenovo%20X1%20Carbon/AppData/Roaming/npm/node_modules/pictoprime/index.js:38:50)

If anyone can help or point me to where I can look/ learn how to work this out for myself that would be greatly appreciated.

[SuperiorSamWise]

I have also tried messing with the dimensions of the 'prime' to see if it looks like Matt at different widths but it does not. (only by changing the shape of a txt file I've pasted it into not by changing the width of the generated prime)

[SuperiorSamWise]

I've figured out what is happening but not really why. It's kind of obvious in hindsight but it is returning the correct picturesque prime just in Hex for some reason. I don't know how to fix this so the output is right but it's simple enough to convert it after.