Borderless Window

[5x9x7x2x7x9]

How could I create a borderless window, Like discord?

[5x9x7x2x7x9]

I found out how to

void setup() {
  fullScreen();
  surface.setSize(400, 400);
  surface.setLocation(500, 500);
}

void draw() {
  background(51);
  fill(255);
  circle(mouseX, mouseY, 100);
}