d3 + threejs graph test (paid)

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I need some help to combine this chart[1] with three.js:

What I want to change is make it 3d as in

add a grid so it is easier to see the xy plane

// Add grid helper
var gridHelper = new THREE.GridHelper( 90, 9 );
gridHelper.colorGrid = 0xE8E8E8;
scene.add(gridHelper);

every black filled circle I want it to be a rotating cube.

//2nd one
var geometry = new THREE.BoxGeometry( 1, 1, 1 );
var material = new THREE.MeshBasicMaterial( { color: "red" } );
var cube2 = new THREE.Mesh( geometry, material );

cube2.rotation.x += 0.01;
cube2.rotation.y -= 0.01;

the cubes can be put all on the same elevation height.

Add these orbit controls.

[1]