Hello Guy's i need help with HTML canvas.

Question

I have made an animation where particle's connect on close proximity

https://code.sololearn.com/WRU0N2U5IEt8/?ref=app

but the time complexity of for loop is O(n2) i want to reduce it to O(n)
I have tried reducing it to single loop, and using 2d array, but it isn't working, plz suggest me some methods.

https://code.sololearn.com/WW6kz54T4Dnl/?ref=app