What you need:

1. Lime green sparkles

2. Dark green sparkles

3. A small jar WITH A LID

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What you need to do:

1. Put the two glitters in the jar

2. Seal the container

3. Shake it up

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Now your "Powder" is finished. I suggest that you don't actually stand in your door frame and throw the powder. It will get you nowhere and you might end up with sparkles in your face.