This challenge can be approached in a similar fashion to the previous one; with the difference being that, this time, you must add a specified shape **within** the appended SVG node. SVG supports several shape definitions, but in this instance, we will use **rect**.
Now assign attributes to the shape using D3's '.attr()' method. You can chain multiple uses of this method. Remember when assigning x and y co-ordinates that within the SVG area, point (0,0) occurs on the top-**left**. As such, while x values dictate how far right an element moves, y values will dictate how far **downward** it moves from the origin point.
