diff --git a/poptimal.js b/poptimal.js
index ecbd1c9..4450fcd 100644
--- a/poptimal.js
+++ b/poptimal.js
@@ -33,44 +33,45 @@ function randomise_params() {
 	}});
 	return {
 		background: palette[0],
+		palette: palette_name,
 		patterns: patterns
 	}
 }
 
 
-function poptimal_svg(width, params) {
+function poptimal_svg(params) {
 	const window = new JSDOM().window;
 	const document = window.document;
 	const container = d3.select(document.body).append("div");
 
-	const dm = new DotMaker(width);
+	const dm = new DotMaker(WIDTH);
 
 	const svg = container.append("svg")
-	  .attr("width", width * CELL * MAG)
+	  .attr("width", WIDTH * CELL * MAG)
 	  .attr("height", HEIGHT * CELL * MAG)
-	  .attr("viewBox", [ 0, 0, width, HEIGHT ]);
+	  .attr("viewBox", [ 0, 0, WIDTH, HEIGHT ]);
 
 	const background = svg.append("rect")
 	  .attr("x", 0)
 	  .attr("y", 0)
-	  .attr("width", width)
-	  .attr("height", width)
+	  .attr("width", WIDTH)
+	  .attr("height", WIDTH)
 	  .attr("fill", params.background);
 
-	const p1 = params.patterns[0];
-	const p2 = params.patterns[1];
 
-	const dots = dm.dots(1 / p1.m, p1.n);
-	const dots_g = svg.append("g")
-	  		.attr("id", `$dots{p1.i}`);
+	params.patterns.map((p) =>  {
+		const dots = dm.dots(1 / p.m, p.n);
+		const dots_g = svg.append("g")
+	  			.attr("id", `dots${p.i}`);
 	
-	dots_g.selectAll("circle")
-	  .data(dots)
-	  .join("circle")
-	  .attr("r", (d) => dm.radius(d, p1.f, p1.r))
-	  .attr("fill", p1.colour)
-	  .attr("cx", (d) => d.x)
-	  .attr("cy", (d) => d.y);
+		dots_g.selectAll("circle")
+		  .data(dots)
+		  .join("circle")
+		  .attr("r", (d) => dm.radius(d, p.f, p.r))
+		  .attr("fill", p.colour)
+		  .attr("cx", (d) => d.x)
+		  .attr("cy", (d) => d.y);
+	});
  
 	const node = svg.node();
 
@@ -117,32 +118,37 @@ async function post_image(image, alt_text, cf) {
 
 async function main() {
 	const argv = yargs(hideBin(process.argv))
-		.usage("Usage: -w WIDTH -o OUTPUT_PNG -g GOTOSOCIAL_CONFIG")
-		.default('w', 1200)
-		.default('o', 'poptimal.png')
+		.usage("Usage: -s SIZE -o output.png -c config.json")
+		.default('s', 1200)
 		.default('g', 'config.json').argv;
 
-	const params = randomise_params();
-	console.log(JSON.stringify(params));
+	const cfjson = await promises.readFile(argv.g);
+  	const cf = JSON.parse(cfjson);
 
-	const svg = poptimal_svg(argv.w, params);
+  	const fn = argv.o || String(Date.now()) + '.png';
+
+  	const imgfile = cf['working_dir'] + '/' + fn;
+
+	const params = randomise_params();
+	const alt_text = JSON.stringify(params);
+
+	const svg = poptimal_svg(params);
 	const opts = {
     	background: 'rgba(255, 255, 255, 1.0)',
     	fitTo: {
       		mode: 'width',
-      		value: argv.w,
+      		value: argv.s,
     	},
     };
+
   	const resvg = new Resvg(svg, opts);
  	const pngData = resvg.render();
   	const pngBuffer = pngData.asPng();
 
-  	await promises.writeFile(argv.o, pngBuffer);
-  	// if( argv.g ) {
-  	// 	const cfjson = await promises.readFile(argv.g);
-  	// 	const cf = JSON.parse(cfjson);
-  	// 	await post_image(argv.o, "An abstract pattern", cf);
-  	// }
+  	await promises.writeFile(imgfile, pngBuffer);
+  	if( cf['base_url'] ) {
+  		await post_image(imgfile, alt_text, cf);
+  	}
 }