Добавление вершин после запуска

    a = this.nodes.push(new Node(6));
    a = this.nodes.push(new Node(7));
    a = this.nodes.push(new Node(8));
    a = this.nodes.push(new Node(9));

import { Component } from '@angular/core';
import APP_CONFIG from './app.config';
import { Node, Link } from './d3';
import {delay} from 'rxjs/operators';
 
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
 
export class AppComponent {
  nodes: Node[] = [];
  links: Link[] = [];
 
  constructor() {
 
    const N = APP_CONFIG.N,
      getIndex = number => number - 1;
 
    /** constructing the nodes array */
    for (let i = 1; i <= N; i++) {
      this.nodes.push(new Node(i));
    }
 
    for (let i = 1; i <= N; i++) {
      for (let m = 2; i * m <= N; m++) {
        /** increasing connections toll on connecting nodes */
        this.nodes[getIndex(i)].linkCount++;
        this.nodes[getIndex(i * m)].linkCount++;
 
        /** connecting the nodes before starting the simulation */
        this.links.push(new Link(i, i * m));
      }
    }
  }
  let a;
  for (let y = 6; y <= 10; y++) {
  delay(5000);
  a = this.nodes.push(new Node(y));
}
}