Grow Trail — Growing Ball Rainbow Trail Video Maker

Grow Trail is a single-ball loop made to be watched to the end: a ball drops into a circle and gets a little bigger every time it bounces. From its very first moment it leaves a trail of frozen echoes — a fresh copy of itself about every hundredth of a second — and each echo keeps the colour the ball had at that instant, while the ball and the circle shift through the rainbow. The bigger it gets, the less room it has, the faster it bounces… until it fills the whole circle.

Why it’s satisfying

Every bounce changes the picture: the trail turns into rainbow tubes that loop and overlap, and the end is never in doubt — it’s just a question of when. The growth is tuned to your video length, so the ball fills the circle right at the end of the clip.

How to make a Grow Trail video

• Open the mode — pick Grow Trail in the editor and choose the video length.
• Customise — add a melody so every bounce plays the next note, a background colour and a title.
• Export 9:16 — download a vertical MP4 for TikTok, Reels and Shorts; the ball fills the circle at the end of the clip.