I am unable to draw particals.

Question

I am trying to draw particals in javascript canvas, but I am unable to draw it.
Please help me.

Thank you.
https://code.sololearn.com/Wff91QlTmZU4/?ref=app

Answer 1

https://code.sololearn.com/W7yEm5nm2SGK/?ref=app

Answer 2

SAN thank you.