D3.JS Change geometry from rect to path - d3.js

Hi Stackoverflow folks,
I have a question on D3.js
Basically what I want to achieve is the change of the shape as below.
However,
Once I finished the coding of the first drawing, the coordinate information was as below.
d3.selectAll('body').select('svg').append('rect')
.attr('x', 50)
.attr('y', 50)
.attr('width',150)
.attr('height',150)
.attr('fill','none')
.attr('stroke-width',2)
.attr('stroke','black')
I tried to change the shape as I clicked the rectangle.
So I made a click event. But!
the Parallelogram I want to achieve should be made of 'path'.
How do I change the square shape as I click the square.
Since I want to do 'animate'for the change,
simply toggle off the square and and toggle on Parallelogram is not what I'm trying to make.
Can any please help me?
Or anyone has better solution for this??
Thank you in advance.

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It's along the lines of what I'm trying to do. My chart is more similar to this example though :
http://blockbuilder.org/pergamonster/419aef09c21ffe8dd1dac971016468d6
Say you wanted to have a 'July 4' tick on both the full axis and the focus axis at all times. I've tried the axis.ticks().push(...arrayOfNumbers) from the above question/answer in my code, but nothing happens. If I do axis.tickValues(arrayOfNumbers) it puts ONLY those numbers as ticks, but I would like to have the auto scaling number PLUS my specific numbers on the axis for the focus area.
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HERE the Plunker
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On the other hand, when the user hovers over the sparkline, the corresponding cell in the heatmap is highlighted.
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HERE MY PLUNKER
add this liblary:
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To solve your problem, you need understand the concept,
The D3 can holding data when you put on it
The D3 can select base on class and id
The DOM element can hold attribute (Ex: attr-id)
Scale linear can be invers, that mean if you have domain you can have range and if you have range you can have domain
Element that draw with D3 is updatable & deletable
understand the liblary you use (d3-tip)
What i Change
i add class and id to element i want to select
if i want to use data, i save data to data-attribute
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read the code if you want to understand ask me which line you dont understand, if you need explanation

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