processing

void setup() {
size (500,500);
background (6,3,17);
}
void draw () {
strokeWeight (0);
smooth ();

fill (238,255,254,50);
ellipse ((random(500)),(random(500)),1,1);

fill (0,0,0,0);
rectMode (CENTER);
ellipse ((random(500)),(random(500)),1000,1000);
stroke(238,255,254,99);

fill (238,255,254,1);
ellipse (mouseX, mouseY, 50,50);

}

figura con movimiento