I need to have a gantt chart/ a timeline created that is interactive. You need to be able to remove and add things easily by clicking on the year in the chart and then some sort of modal popup box comes up with a small form to fill in the details. Then clicking save it will add it to the chart. Clicking a task already on the graph should open up the form again so you can change times/colors etc. I have an image of what it needs to look like and a list of functionality it needs to have.