How to add delay in between DoTween sequence instructions?

Following is my DoTween sequence code ( pasted only a little part). I am using yield to add delay between sequence instructions. Is there any way to add delay between sequence instructions without using yeild. Also , I want the sequence to be seekable just like a video. For that I have added a slider and as the sequence plays the slider keeps on going ahead which is working fine. Now, I want to give a button to pause and resume this sequence and also allow the user to move the slider and the sequence should start from that slider seek point.
How can I achieve this?

Code (CSharp):

1.   mySequence.Append(mainCamera.transform.DOMove(new Vector3(target18.position.x, target18.position.y, target18.position.z), 2));
2.             mySequence.Append(mainCamera.transform.DORotate(new Vector3(target18.localEulerAngles.x, target18.localEulerAngles.y, target18.localEulerAngles.z), 2));
3.  
4.             yield return new WaitForSeconds(2); //50
5.  
6.  
7.             CallOutPanel.gameObject.SetActive(true);
8.             CalloutText.text = "Oh, did you notice that damaged TV?";
9.             AudioScript.current.PlayAudio(AudioScript.current.m_acAutoFlightAudio1);
10.             #endregion
11.  
12.             #region Television Set Claim Assessment Demo
13.  
14.             yield return new WaitForSeconds(AudioScript.current.audioSource.clip.length + 1); //53.5
15.             m_oMouseCursor.SetActive(true);
16.             mySequence.Append(m_oMouseCursor.transform.DOMove(new Vector3(mouseTarget2.transform.position.x, mouseTarget2.transform.position.y,
17.                                                                             mouseTarget2.transform.position.z), 2));
18.             mySequence.Append(m_oMouseCursor.transform.DORotate(new Vector3(mouseTarget2.transform.localEulerAngles.x, mouseTarget2.transform.localEulerAngles.y,
19.                                                                             mouseTarget2.transform.localEulerAngles.z), 2));
20.             yield return new WaitForSeconds(2); //55.5
21.             CursorClickAnimationPlayer.current.m_bPlayAnimation = true;
22.             yield return new WaitForSeconds(0.5f);  //56
23.             CursorClickAnimationPlayer.current.m_bPlayAnimation = false;
24.             m_oMouseCursor.SetActive(false);
25.  
26.             #endregion
27.  
28.             #region UI & Bi-focal display
29.  
30.             #region Display Details Panel
31.  
32.             SampleDemoUI.SetActive(true);
33.             //TransparentWhiteBG.color = new Color(255, 255, 255, 0.5f);
34.             yield return new WaitForSeconds(1); //57
35.  
36.             originalBtn.GetComponent<Image>().color = new Color(255, 255, 255, 0.5f);
37.             ImagePanelImg.color = new Color(255, 255, 255, 0.5f);
38.  
39.  
40.             yield return new WaitForSeconds(3); //60
41.             DetailsPanel.transform.SetAsLastSibling();
42.             HighlighterImage.transform.SetAsLastSibling();
43.             mySequence.Append(HighlighterImage.GetComponent<RectTransform>().DOAnchorPos(new Vector2(169, 15f), 0.5f));
44.             mySequence.Append(HighlighterImage.transform.DOScale(new Vector3(3.91f, 2.63f, 1), 0.5f));
45.             HighlighterImage.SetActive(true);
46.             mySequence.Append(HighlighterImage.transform.DOShakeScale(6, 0.1f, 1, 10, true));
47.             //callout & audio
48.             CalloutText.text = "You can view the details of the object on the side.";
49.             AudioScript.current.PlayAudio(AudioScript.current.m_acAutoFlightAudio2);
50.             yield return new WaitForSeconds(AudioScript.current.audioSource.clip.length + 3);   //65.6
51.  

 

You could use

Code (CSharp):

1. mySequence.AppendInterval(float interval)

to add the given interval to the end of the Sequence.