Add multiple Objekts to my Scene

i have a function that should create a Sphere. and that is working fine. But if i call this function multiple times i can just see the last created Objekt in the scene.

var AllObjekts = [SCNNode]()

func createSphere(X: Float, Y: Float, Z: Float, NumObj: Int, Color: NSColor){
    let sceneView = BrainView
     
    let scene = SCNScene(named: "Brain.scn")
    sceneView?.scene = scene
     
    let geometry:SCNGeometry = SCNSphere(radius: 0.1)
    geometry.materials.first?.diffuse.contents = Color //NSColor.red
     
    let geometryNode = SCNNode(geometry: geometry)
    AllObjekts.append(geometryNode)
    geometryNode.position = SCNVector3(x: CGFloat(X), y: CGFloat(Y), z: CGFloat(Z))
    scene?.rootNode.addChildNode(AllObjekts[NumObj])
  }

createSphere(X: 0, Y: 0, Z: 0, NumObj: 0, Color: .green)
    createSphere(X: 1, Y: 0, Z: 0, NumObj: 1, Color: .blue)

how the fuck can i fix it?