float x;
float y;

StartSteam()
{
    llParticleSystem([PSYS_PART_MAX_AGE,2.00,
    PSYS_PART_FLAGS, 259,
    PSYS_PART_START_COLOR, <1.00000, 1.00000, 1.00000>,
    PSYS_PART_END_COLOR, <1.00000, 1.00000, 1.00000>,
    PSYS_PART_START_SCALE, < x, y, 0.00000>,
    PSYS_PART_END_SCALE, < x, y, 0.00000>,
    PSYS_SRC_PATTERN, 16,
    PSYS_SRC_BURST_RATE,0.00,
    PSYS_SRC_BURST_PART_COUNT,4,
    PSYS_SRC_BURST_RADIUS,0.00,
    PSYS_SRC_BURST_SPEED_MIN,0.05,
    PSYS_SRC_BURST_SPEED_MAX,0.10,
    PSYS_SRC_ANGLE_BEGIN, 0.00,
    PSYS_SRC_ANGLE_END, 0.00,
    PSYS_SRC_MAX_AGE, 0.0,
    PSYS_SRC_TEXTURE, "f76cf2d9-2666-e0a6-066c-a3f62e156e81",
    PSYS_PART_START_ALPHA, 0.05,
    PSYS_PART_END_ALPHA, 0.00]);
}

StopSpray()
{
    llLinkParticleSystem(LINK_SET, [] );
}

default
{
    on_rez(integer p)
    {
        llResetScript();
    }

    state_entry()
    {
        key id = llGetOwner();
        vector boundingbox = (llList2Vector(llGetBoundingBox(id),1)) - (llList2Vector(llGetBoundingBox(id),0));
        float x = boundingbox.x;
        float y = boundingbox.y;
        llSetTimerEvent(0.1);
    }

    timer()
    {
        if (llGetAgentInfo(llGetOwner()) & AGENT_FLYING)
        {
            StartSteam();
        }
        else if (llGetAgentInfo(llGetOwner()) & AGENT_WALKING)
        {

            StartSteam();
        }
        else
        {
            StopSpray();
        }
    }
}