Behaviors

A dog object might have
“bark” behavior
“walk around” behavior
“love humans” behavior

Scripts describe behaviors that get attached to Game Objects

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		transform.Translate (0, -2.5 * Time.daltaTime, 0, Space.World);
	}
}