Hi, i am new into programming and i wanted to ask you how to turn a random value into static.

i made a program with a crosshair and circles and i want the circles to be drawn in random places, maintain their values and then make them move in a diagonal direction. but instead, i have a lot of circles flickering all over the window.

here is the code:

float randomx, randomy, posx, posy;

void setup() {
  size(800, 600);
}

void draw() {
  randomx = random(0, width);
  randomy = random(0, height);
  posx = randomx;
  posy = randomy;
  rect(0, 0, width, height);
  fill(255, 50);
  line(0, mouseY, width, mouseY);
  line(mouseX, 0, mouseX, height);
  ellipse (posx, posy, 10, 10);
}