// adding the disks to the stack structure, which is a 2d array.
        for(var i = 0;i<5;++i){
            var darkWood = new THREE.MeshPhongMaterial({
                map: woodTex,
                color: 0xAAAAAAAA
            });
            var disk = new THREE.Mesh(new THREE.TorusGeometry(0.03+0.01*i,0.03+0.01*i-0.02,32,32),darkWood);
            disk.raised = false;
            disk.castShadow=true;
            disk.receiveShadow=true;
            disk.number = i;
            disk.rotation.set(Math.PI/2,0,0)
            disk.scale.set(1.0,1.0,0.015/(0.03+0.01*i-0.02));
            diskMeshes[i] = disk;

            stacks[0].push(i);
        }
        for(var i = 0; i < diskMeshes.length;++i){
            scene.add(diskMeshes[i]);
        }
        stacks[0].reverse();