Particles Opacity

key	option type	example	notes
`value`	`number` / `range`	`0...1` / `{ min: 0.1, max: 0.8 }`
`animation.destroy`	`string`	`min` `max` `none`	Destroys the particles if not `none` when it reaches the `min` or `max` value of the animation
`animation.enable`	`boolean`	`true` / `false`
`animation.speed`	`number`	`3`	Rate expressed as % per second for particle opacity values to reach min and max specified opacity values
`animation.startValue`	`string`	`min` `max` `random`	Defines where is the starting value of the animation, if `random` property is set this will be ignored
`animation.sync`	`boolean`	`true` / `false`	Unless `animation.startValue` is set to `random`, when `sync` is toggled `true`, particles will change opacity simultaneously for their entire duration; when `false`, particles begin changing opacity from their time of appearance, but independently of one another.