About coordinates

Question

What should I do so that when you click the cursor is in the center of the shape, and the shape appears from this center
https://code.sololearn.com/W25Gy530pSL7/?ref=app

Answer 1

something like this?
https://code.sololearn.com/WeJvOKFYD5jp/?ref=app

Answer 2

Игорь Яковенко , thanks

Answer 3

ShortCode , no not at all. I wanted to see how the pulsation was but Игорь already helped me but anyway thanks

Answer 4

https://code.sololearn.com/W80AeHyg504A/?ref=app