Are there self-contained captchas in PHP that look cool now?

Question

PHP

Recommend self-sufficient PHP captcha (without third-party services like Google). She needs to look interesting, not boring

Answer 1

Something like go through Tetris, Sokoban, Arkanoid or Mario and get a chance to post a comment ?!) Or is it easier?)
To put it simply: PHP does not start in the browser and cannot look cool)
Cool - only the visual part can look, but it - not in PHP, but in HTML5/CSS3/JS
What is required?)