Why animation can't works 😕. (line 39)

Question

https://code.sololearn.com/Wc7ZMQYtRkOG/?ref=app

Answer 1

a slash (/) ending a tag is kind of shortcut to avoid writing the closing tag of an content empty element (in svg):

<rect attributes />

is same as:

<rect attributes></rect>

if you need to nest other elements inside, you must use the second form:

<rect attributes>
<animate attributes />
</rect>

else:

<rect attributes />
<animate attributes />

is same as:

<rect attributes></rect>
<animate attributes />

so animate do not belong to rect element ^^

Answer 2

Remove the "/" From the rect tag ending above animate