An experiment on real time visualize development tool, inspired by Bret Victor's Inventing on Principle talk and @ermau C# Implementation.

Run a demo

You can run it live at

Run locally

First clone the source code from

In the app folder, run following commands:

bundle install
foreman start

then open your browser at

Install as gem

Install the Gem:

gem install instant

Then in your program:

require 'rubygems'
require 'instant'

runner = "def hello(a); a = 10 + a; end; hello(20)"