streamChain.js

function streamChain(seed) {
	var accumulator = [];

	var streamFacade = {
		write: function() {
			throw new TypeError("This is not a stream. Please call sequence or parallel to get a stream out of this.");
		},
		pipe: function(stream) {
			if (!seed) {
				seed = stream;
			}
			else {
				accumulator.push(stream);
			}

			return streamFacade;
		},
		parallel: function() {
			accumulator.reduce(function(current, next) {
				current.pipe(next);
				return current;
			}, seed);

			return seed;
		},
		sequence: function() {
			accumulator.reduce(function(current, next) {
				current.pipe(next);
				return next;
			}, seed);

			return seed;
		}
	};

	return streamFacade;
}