Help shoot ellipse beginner complete new

How can I shoot ellipses? Example > https://youtu.be/v1kqMxsvElM?t=514

For example in draw() say

ellipse(eX,eY,5,5);

eX = eX + 5;
eY = eY + 3;

Before setup say int eX, eY;

Read the first three text tutorials on the website

are you looking for something like this?

arrows to move, e to shoot

https://editor.p5js.org/paulgoux/sketches/0lem09rp-