Choice of technologies

I want to make a web app with dynamic content, I know a little HTML5 and JS but probably I will need to expand to other technologies.

What I need to do is the following:

The web app retrieves information from a web service, then it proceeds to show it.

The information that shows is represented by rectangles, this rectangles are set in distinct positions on the screen. Every time there is a change in the information, the rectangles move from one exact position to another.

So, basically I need to do 2 things.

1) Retrieve information from a restful service. 2) Have a way to move this rectangles to exact positions on the screen.

I was thinking to do this work using HTML5, CSS, Bootstrap and JS.

Is this achievable with this techonlogies?

What I fear most is the second part, In a convencional app I would move the rectangles inside a Canvas modifying the .X and .Y parameters, but I dont know if this is possible with HTML,CSS and JS.

Thanks in advance!