How can I turn the screen black with an input

add a border to your canvas


Set A under Brush Color to Zero and make sure to Change the Brush Color to Black
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Now click Animation


Add Animation and Name It
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Click on the Animation You Named and Track said Border (Not the Canvas Slot)
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Click the Plus Sign
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Content Color and Opacity
Set the A to 1 on any Timestamp
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Then Reference in your Player Character