Visualize audio spectrum with delay

This code is working and it's visualizing the sound frequencies on a line from audiolistener, it gets the sound from a synth that is build in c# and can be played in realtime. I want to put many of this lines next to each other with a short audio delay at each line execpt the first. the result would look like the famous joy division cover. I thought it could be maybe done with the WaitForSeconds class but i can't figure it out. I

 using UnityEngine;
 using System.Collections;
 
 [RequireComponent(typeof(LineRenderer))]
 public class LineVisualizer : MonoBehaviour
 {
     public float size = 10.0f;
     public float amplitude = 1.0f;
     public int cutoffSample = 128; //MUST BE LOWER THAN SAMPLE SIZE
     public FFTWindow fftWindow;
 
     
     private float[] samples = new float[1024]; //MUST BE A POWER OF TWO
     private LineRenderer lineRenderer;
     private float stepSize;
 
     void Start()
     {
         lineRenderer = GetComponent<LineRenderer>();
         lineRenderer.SetVertexCount(cutoffSample);
         stepSize = size/cutoffSample;
     }
 
     // Update is called once per frame
     void Update ()
     {
         AudioListener.GetSpectrumData(samples,0,fftWindow);
 
 
 
         int i = 0;
 
         for(i = 0; i < cutoffSample; i++)
     
 
         {
             Vector3 position = new Vector3(i*stepSize - size/4.0f,samples[i]*amplitude,4.0f);
             lineRenderer.SetPosition(i,position);
             
             
             
         }
 
 
     }
 }