nimateSecondStep(){
                d3.select(this)
                  .transition()
                    .duration(1000)
                    .attr("r", 40);
            };

            return "Try clicking the circle!";
            ```

            Users get access to **d3**, which is the library itself, and **graphElement**, which is a reference to the element where the graph is drawn.

            d3 is incredibly powerful, but may be too complex for many users. To help out with this, Kajero also includes 