I'd use blues and greens out in the yard. If you are using any props out in the yard highlight with red or amber lights.
Do you have any large hanging props for that area around the garage? If not, I'd be tempted to do a large spider web (using clothesline?) and highlight that with an amber/red spot... but you could just go all lights and the window ghosts. In which case, I'd do mostly green in the yard, and light up the window ghosts with the blacklights (blueish?) and see how that goes.
Do you have any large hanging props for that area around the garage? If not, I'd be tempted to do a large spider web (using clothesline?) and highlight that with an amber/red spot... but you could just go all lights and the window ghosts. In which case, I'd do mostly green in the yard, and light up the window ghosts with the blacklights (blueish?) and see how that goes.