Adding precipitation event

This was the code I could come up with,

function object::onCollision(%this, %obj, %col)
{
    %newEn = new Item() {
    datablock = Sandstorm;
    };
    missionCleanup.add(%newEn);
    %newLogo.setTransform("25 -400 10 1 0 0 0");
    echo("Inserting Shape " @ %newLogo);
    return %newEn;
}

I based the code on this,

function createLogo()
{
    %newLogo = new Item() {
    datablock = TorqueLogo;
    };
    missionCleanup.add(%newLogo);

    // Object setup
    %newLogo.setTransform("25 -400 10 1 0 0 0");
    echo("Inserting Shape " @ %newLogo);
    return %newLogo;
}

I wanted to add a precipitation object into the mission on collision with object however the code doesn't seem to work and I'm kinda lost on how to work with it.