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ummm, i made a quick one, i used waits for the speed, use timers (it will take more time to be made than waits but waits are unwanted - even i added them it's just to give you a preview)
I also used local variables, which if you do not know, like variables but they can not be changed by any other trigger than the current trigger i also added a custom effect to make it look like the icon ~DARK~ provided
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where did you get that custom effect? :/