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This part is also crucial, as you need to pick logical (but inconspicuous) spots to place the LEDs: if you place them too far apart from each other, the light beam won't be strong enough to blind a camera, but if you place them too close, they will hide your face from a certain angle but not others. Think this out and position them well. Mark each spot with a marker, then cut a few holes with a pair of small scissors in the middle of the front of the hat as well as a few on the sides.