gistfile1.cs

using UnityEngine;
using System.Collections;

public class Crawler : MonoBehaviour {

	public Sprite[] frames;

	void Start () {
		StartCoroutine(Loop());
	}

	private IEnumerator Loop() {
		var spriteRenderer = GetComponent<SpriteRenderer>();



		while (true) {
			spriteRenderer.sprite = frames[0];
			yield return new WaitForSeconds(0.2f);

			transform.position += Vector3.right * 0.01f;

			spriteRenderer.sprite = frames[1];
			yield return new WaitForSeconds(0.2f);

			transform.position += Vector3.right * 0.01f;

			spriteRenderer.sprite = frames[2];
			yield return new WaitForSeconds(0.1f);

			spriteRenderer.sprite = frames[3];
			yield return new WaitForSeconds(0.1f);
		}
	}

	void Update () {
	
	}
}