// Grab a free Sequence to use
Sequence mySequence = DOTween.Sequence();
// Add a movement tween at the beginning
mySequence.Append(transform.DOMoveX(45, 1));
// Add a rotation tween as soon as the previous one is finished
mySequence.Append(transform.DORotate(new Vector3(0,180,0), 1));
// Delay the whole Sequence by 1 second
mySequence.PrependInterval(1);
// Insert a scale tween for the whole duration of the Sequence
mySequence.Insert(0, transform.DOScale(new Vector3(3,3,3), mySequence.Duration()));