How can I make an object in my scene jump continuously?

Hello Unity people! I am currently working on a game that will have the player collecting object in the level. I wont get into detail as its not important. I will have objects in the scene the player is collecting, in this case I want it to be a sheep. For testing purposes, the “sheep” is currently just a cube, and I have it moving around in a circle. However, I want it to continuously jump as well as it moves around. `using UnityEngine;
using System.Collections;

public class Movement : MonoBehaviour {



void Update () {
	transform.Translate (new Vector3 (1, 0, 0) * Time.deltaTime);
	transform.Rotate (new Vector3 (0, 45, 0) * Time.deltaTime);


That is what I have for moving the “sheep” (cube) in a circle. I tried simply adding another line to the update: “transform.Translate (new Vector3 (0, 3, 0) * Time.deltaTime);”. However, it would jump a couple times like this then would glitch like crazy landing on it side and flying into the walls. Anybody know how I could make the cube continuously jump? Thanks in advance!

using UnityEngine;
using System.Collections;

public class rotateScript : MonoBehaviour {
	public float minRotationSpeed = 80.0f;
	public GameObject pivot;

	bool grounded; 
	void Start() { 

	void Update() {
		transform.RotateAround(pivot.transform.position, Vector3.up, minRotationSpeed * Time.deltaTime);

		if (grounded)
			transform.Translate(Vector3.up * 2 * Time.deltaTime, Space.World);

	void OnCollisionEnter(Collision collision) {
		if (collision.gameObject.tag == "ground") {
			grounded = true;
		} else {
			grounded = false;