White background white text when ellipse moves to text. Text not appear

https://www.behance.net/gallery/75113211/Interactive-Posters?tracking_source=search_projects_recommended|Processing%20Poster%20Design

Guys if u check this project there is video check the 1.42.

Guys, in the video there is black ellipse and white text, the text does not normally appear because it is the same color as the background. But when ellipse comes to text we can see the text. I was able to play the ellipse as here, I added the text, but when it comes to the text, the text does not appear. Can anyone tell me the code here?

What, something like this?

void setup(){
  size(600,400);
  textSize(48);
}

void draw(){
  background(255);
  fill(0);
  noStroke();
  ellipse( mouseX, mouseY, 100, 100 );
  fill(255);
  text("TFGUY44 RULES!", 100, 100);
}

Yes I figure it out that but now I cant understand how the write the text like vertical?

Hello,

The Processing website has resources (tutorials, examples, references, etc.):
https://processing.org/

:)