How to set negative coordinates in JavaScript

Question

I am trying to make a code in landscape mode for this - I make the screen rotated to 90 degrees but I have difficulty in pointer cordinates
Please Help.

https://code.sololearn.com/WlF9oA023Oj9/?ref=app

Answer 1

In line 10 change (orientation to landscape)

Answer 2

Thanks Yasin Rahnaward. But I want to Rotate the screen to 90 degrees This can be done in portrait orientation, so have difficulty to change the pointer cordinates

Please help in line 173 and 174

Answer 3

The pointer cordinates will be
X= Y
Y= -x
But I couldn't set it Please Help.