error CS0120: An object reference is required to access non-static member

I just want to rotate a sphere so it rolls on x axis but I keep getting this errors.

Errors:

/Move.cs(12,27): error CS0120: An object reference is required to access non-static member UnityEngine.Transform.Rotate(UnityEngine.Vector3)' > /Move.cs(14,27): error CS0120: An object reference is required to access non-static member UnityEngine.Transform.Rotate(UnityEngine.Vector3)'

Script:

public class Move : MonoBehaviour { void Start () { } void Update () { if(Input.GetKeyDown("Right")); Transform.Rotate(Vector3.Right Time.deltaTime); if(Input.GetKeyDown("Left")); Transform.Rotate(Vector3.Left Time.deltaTime); }