How to create a delay in a function being called in update?

I am having an issue trying to delay my code once a certain condition has been met. Basically I have a laser object that turns towards a max angle and once that angle is reached, it revolves back the other way. I want to be able to pause the laser as it hits the max angle for a certain amount of time, then continue with the rest of the code. My code is shown below

 public class LaserRotate : MonoBehaviour
 {
     [Header("XZ Plane Rotation")]
     public bool ContinuousRotation; //if laser should continue to rotate
     [Range(0,179)] //Anything greater or equal to 180 causes full revolution
     public float RotationAngle; // max total rotation angle from starting point in xz direction
     public float RotationSpeed; //How fast to rotate
 
     private Quaternion StartingRotation;
     private Quaternion TargetRotation;
     private float RelativeRotation; //signifies angle with respect to starting position
     private Vector3 AngleRotate; 
 
     private int direction = 1; //positive is clockwise,negative counter
     // Use this for initialization
     void Start ()
     {
         AngleRotate = new Vector3(0, direction * RotationAngle, 0);
         StartingRotation = transform.rotation;
         TargetRotation = Quaternion.AngleAxis(RotationAngle, AngleRotate); 
         RelativeRotation = transform.rotation.eulerAngles.y - StartingRotation.eulerAngles.y;
     }
     
     // Update is called once per frame
     void Update ()
     {
         LaserRotation();
     }
 
     public void LaserRotation()
     {
         AngleRotate = new Vector3(0, direction * RotationAngle, 0);
         TargetRotation = Quaternion.AngleAxis(RotationAngle, AngleRotate * direction); 
         RelativeRotation = (transform.rotation.eulerAngles.y - StartingRotation.eulerAngles.y);
 
         if (Mathf.Abs(RelativeRotation) > 180) 
         {
             RelativeRotation = 360 - Mathf.Abs(RelativeRotation);
         }
         //print("Relative Rotation angle is: " + RelativeRotation);
         //print("Target Rotation is: " + TargetRotation.eulerAngles.y);
         if (RelativeRotation >= TargetRotation.eulerAngles.y) 
         {                                                  
             direction = direction * -1;                     
             StartingRotation = transform.rotation; 
             print("Reversing direction...");
         }
         transform.Rotate(AngleRotate * Time.deltaTime * RotationSpeed);       
         
     }
  
 }

In the segment

 if (RelativeRotation >= TargetRotation.eulerAngles.y) 
          {                                                  
              direction = direction * -1;                     
              StartingRotation = transform.rotation; 
              print("Reversing direction...");
          }

I want to add a small delay, because this signifies when the max angle has been reached. I want the laser to stay there for about a second, then continue with the rest of the code.

I've tried using coroutines, but this does not prevent the update from completing. If I try putting the entire function in a repeating coroutine that I call from start, the laser just jumps from max position to beginning position.