How to pause animation in JS?

Question

Python

There is a code https://jsfiddle.net/hibinyru/549vkdhx/3/ - this is an animation of static images.

Question 1. In this case, how can I pause this animation by clicking on the picture?

Question 2. Why does the animation speed up when the loop is executed several times, the further the faster

Thanks in advance

PS. I'm not very good at JS :( I took the finished code and filed it for myself. I can't write something new

Answer 1

pattern = '<[^>]+>'
# выражение означает строку между символами < и >
# квантификатор + - один или более символов
# квантификатор * -  ноль или более символов
# квантификатор ? - ноль или один символ

That is, in the string with
this regular expression there is only<abc def>

>>> import re
>>> string = '<p style="margin-left:10px;">text<b class="super-bold">bold text</b>.<p>'
>>> string2 = '<abc def>gfh>'
>>> pattern = '<[^>]+>'
>>> 
>>> result = re.findall(pattern,string)
>>> print result
['<p style="margin-left:10px;">', '<b class="super-bold">', '</b>', '<p>']
>>> 
>>> result2 = re.findall(pattern,string2)
>>> print result2
['<abc def>']

Answer 2

The result gets:
1) character < (<)
2) 1 or more characters other than > ([^>]+)
3) character > (>)
All this based on the regular expression <[^>]+>

Answer 3

Read the documentation
https://docs.python.org/3/library/re.html

Answer 4

<[^>]+>
The answer is simple: after opening, we look for everything that is inside until there is a closure.
those. (this is just an example FOR UNDERSTANDING, and the tag structure here, of course, is not correct):
or
<a sdfsd>>>>>- will be:<a sdfsd>

Answer 5

To “stop” a value, write it to a variable, which will allow you to start counting not from the very beginning. To be able to restore, write your interval to another variable and reset it for those events when you need it.
To eliminate speedup, check if you have a dependency on an incremented value or a nested loop.

Answer 6

function stopAnimation() {
clearInterval(function);
}
And the second, I don't even know how to solve