paper.js/examples/Node.js/BooleanOperations.js

// Please note: When loading paper as a normal module installed in node_modules,
// you would use this instead:
// var paper = require('paper-jsdom-canvas');
var paper = require('../../dist/paper-core.js');
var http = require('http');

http.createServer(function(request, response) {
    var canvas = paper.createCanvas(800, 800);
    paper.setup(canvas);
    with(paper) {
        var style = {
            fillColor: new Color(1, 1, 0, 0.5),
            strokeColor: new Color(0, 0, 0),
            strokeWidth: 1.5
        };

        var first = new Path.Rectangle([50, 50], [150, 150]);
        first.style = style;
        var second = first.clone().translate(50, 50);
        second.style = style;

        var intersection = first.subtract(second);
        intersection.style = style;
        intersection.translate(250, 0);
        view.update();
    }
    var stream = canvas.pngStream();
    stream.on('data', function(chunk) {
        response.write(chunk);
    });
    stream.on('end', function() {
        response.end();
    });
}).listen(3000);

console.log('Server running at http://127.0.0.1:3000/');