How did they added stack glow animation on prefab cube boundaries in stack game by ketchapp ?

hello i am learning to make games just wanted to make a remake of stack game but i am stuck in the glow animation when the cube stack perfectly .122853-capture.png

You should look into particle effects.

You’ll learn a lot by watching this.

Mobile games should have limits to particle effects. This game is simple but it would be better to use another method.
The way this game probably does that, is it activates a plane beneath the block and on the plane there is a fade script attached. When the plane is activated, the script activates to trigger the start function which contains a fade out code by changing the alpha of its material.