Thank you for sharing your dream with us. Please take everything that I share back to the Holy Spirit as He Alone has the accurate interpretation.
Please kindly note that me being explicit below is not meant to embarrass you in any way. Reflect on a “grey” area/matter (play on words on the colour grey/gray) that might be raising it’s head in your life/in your circles/association. It might have to do with lust(red), power (red) and/or anger(red). This is not a private manner and it is on display for/to others (curtains) and is a central issue (position of curtains in the middle). This dream could also be a warning for now and/or in the future (windows). May the Holy Spirit give you clarity and grace to overcome. Remember Zechariah 4:6 and I Corinthians 10:12.