RotateCardsThatPassThroughAZone

function onLoad()
    --if the script is on Global then declare the zone here:
    zone = getObjectFromGUID("d15e01")

    --alternately, if the script is on the zone itself, decalre the zone as follows:
    --zone = self
end

function onObjectEnterScriptingZone(zone, obj)
    if zone == zone and obj.tag == "Card" then
        Wait.condition(
            function()
                obj.setRotationSmooth(obj.getRotation():add(Vector(180, 0, 0)))
            end,
            function()
                return (obj.resting and not obj.held_by_color)
            end
        )
    end
end