Dissolve Effect Video

Animate the component from transparent to opaque or from opaque to transparent. when the dissolve effect is played.
It does the following:
1. When the effect begins, it crate an opaque rectangle. The rectangle floats above the target component, its color matches the dissolve color property and its alpha property is initially set to(1.0 dissolve.alpha from).
2. As the effect plays, the alpha property of the rectangle animates from (1.0 alpha from to 1.0- alpha to). As the rectangle becomes more and more opaque, the content underneath it gradually disappears.
3. When the effect finishes, the rectangle is destroyed.