gistfile1.sh

gsettings set org.gnome.desktop.background picture-uri file:///home/visgean/.trianglify_background.svg

trianglify_background.js

#!/usr/bin/env node

var fs = require('fs');
var Trianglify = require('trianglify');

var t = new Trianglify();
var image_data = t.generate(1920, 1080).svgString;

// now we need to lowercase PATH and SVG tags
image_data = image_data.split('PATH').join('path')
image_data = image_data.split('SVG').join('svg')

fs.writeFile('/home/<username>/.trianglify_background.svg', image_data, function(err) {
    if(err) {
        console.log(err);
    }
});