Rotate a chain

function CreateChain(%posX, %posY)
{
   // Set-up some initial dimensions.
    %linkWidth = 3;
    %linkHeight = %linkWidth * 3;
    %halfLinkHeight = %linkHeight * 0.5;
    %weightSize = 18;
    %weightHalfSize = %weightSize * 0.5;
    %pivotDistance = %linkHeight * $ChainLinks;  

    // Create a fixed pivot object.
    %fixedObject = createPole();

    // Set-up the last linked object as the fixed pivot.
    %lastLinkObj = %fixedObject;
    // Now add the rest of the links.
    for ( %n = 1; %n <= $ChainLinks; %n++ )
    {
        // Create the link object.
        if (%n == 1)
        %obj = new Sprite(chain);
        else 
        %obj = new Sprite();
        %obj.setImage( "RopeStone:chain" );
        %obj.setPosition( %posX + (%n*%linkHeight), %posY );
        %obj.setSize( %linkWidth, %linkHeight );
        %obj.setDefaultDensity( 30 );
        %obj.setDefaultFriction( 0.3 );
        %obj.createPolygonBoxCollisionShape( %linkWidth, %linkHeight );
        %obj.SceneLayer = 31;
        myScene.add( %obj );   

        // Create a revolute joint from the last link to this one.
        if (%n == 1)
            myScene.createRevoluteJoint( %lastLinkObj, %obj, 0, 0, 0, %halfLinkHeight, false );
        else
            myScene.createRevoluteJoint( %lastLinkObj, %obj, 0, -%halfLinkHeight, 0, %halfLinkHeight, false );

        // Reference this link as the last link.
        %lastLinkObj = %obj;
    }    

    // Create the weight.
    %weight = createStone();

    // Create a revolute joint from the last link to the weight.
    myScene.createRevoluteJoint( %lastLinkObj, %weight, 0, -%halfLinkHeight, 0, %halfLinkHeight, false );
}

chain.moveTo("10 10", 100);

chain.rotateTo(20, 10);