nycJSorg/angular-presentation

<div class="grid">
  <div class="row" *ngFor="let i of f">
    <div
      class="cell"
      *ngFor="let o of f"
      [class.central]="i === 4 && o === 4"
      [style.animation-delay.s]="randomDelays[i][o]"
    ></div>
  </div>
</div>