Fire projectile, tracing a Raycast, enemy AI, 2D

'Aight, here's the situation:

• Enemy patrols, depending on direction, speed and whether it's hit a wall or not.

• If the player walks inside its range, it stops and STARES O_O...

• It also does some damage and knocks the player back on collision - standard stuff...

What I want it to do: - Instead of STARING at the player ... I want it to trace a raycast, instantiate my laser object and apply force in the direction ( or using the angle ) of the raycast. - Alternatively ... I could make it shorter than the player and make it a dull enemy firing in a straight line ... but that wouldn't be fun now would it.

Here's my script so far with the note that I already have some working enemies and a boss fight, it's just this that I'm having an issue with, I don't want to be spoon fed and would much rather theoretical responses with short examples THANKS!

 public class Enemy1 : MonoBehaviour 
 {
     //Public variables
     public float moveDistance; //Distance the enemy will move on both sides/aka Patrol distance
     public float moveSpeed; //Speed at which the enemy will move
 
     //Private variables
     private bool playerInside; //Used to check if the player is inside
     private float orgPos; //The enemy's original position
     private float useSpeed; //Some more speed variables
     private bool wallInTheWay; //Indicates if a wall has been hit
     private Animator _anim1; //Used for animation, specifically the shooting one
 
     //Some general logic 
     void LateUpdate()
     {
         Debug.DrawRay (transform.position,GameObject.Find ("nyan").transform.position - transform.position , Color.green);
     }
 
     //Setting up CoUpdate() and variables
     private IEnumerator Start()
     {
         //Grab the component so that we can animate stuff
         //_anim1.gameObject.GetComponent<Animator> ();
 
         //Patrol speed and initial position
         useSpeed = -moveSpeed;
         orgPos = this.gameObject.transform.position.x;
 
         //Assign bools to false, avoiding any stupid scenarios
         wallInTheWay = false;
         playerInside = false;
 
         //And finaly start CoUpdate()
         yield return StartCoroutine (CoUpdate ());
     }
 
     //CoUpdate - Update() with the block functionality
     private IEnumerator CoUpdate()
     {
         //Stuff here happens once
 
         //Update
         while (true) 
         {
             //Screem, aim and fire
             if(playerInside)
             {
                 yield return StartCoroutine(ScrAimFire());
             }
             //Or... wait for it... waaaaait for it...
             else if(!playerInside)
             {
                 //If there is no wall in the way patrol in regular intervals 
                 if(!wallInTheWay)
                 {
                     //Based on position, assign direction 
                     if(orgPos - this.transform.position.x > moveDistance)
                         useSpeed = moveSpeed;
                     else if(orgPos - this.transform.position.x < -moveDistance)
                         useSpeed = -moveSpeed;
 
                     //And move...
                     this.transform.Translate (useSpeed * Time.deltaTime, 0, 0);
                 }
                 //If there is a wall there however...
                 else if(wallInTheWay)
                 {
                     //Translate the object accordingly
                     yield return StartCoroutine(WallMovement());
                 }
             }
 
             //Always - to avoid infinit loops and crashes
             yield return null;
         }
     }
 
     //Check if the player is in range
     private void OnTriggerEnter2D(Collider2D plr)
     {
         if (plr.gameObject.tag == "Player") 
             playerInside = true;
     }
 
     //Make sure to disable the trigger if the player is no longer in range
     private void OnTriggerExit2D(Collider2D plr)
     {
         if (plr.gameObject.tag == "Player")
             playerInside = false;
     }
 
     //Various collision checks
     private void OnCollisionEnter2D(Collision2D obj)
     {
         //If it's a player...
         if (obj.gameObject.tag == "Player") 
         {
             //Knockback and stop the player ... kinda messy due to all the component fetching
             if(obj.gameObject.GetComponent<Rigidbody2D>().velocity.x < 0)
             {
                 obj.gameObject.GetComponent<Rigidbody2D>().velocity = new Vector2(0,0);
                 obj.gameObject.GetComponent<Rigidbody2D>().AddForce(new Vector3(2000.0f,0.0f,0.0f));
 
             }
             else if(obj.gameObject.GetComponent<Rigidbody2D>().velocity.x > 0)
             {
                 obj.gameObject.GetComponent<Rigidbody2D>().velocity = new Vector2(0,0);
                 obj.gameObject.GetComponent<Rigidbody2D>().AddForce(new Vector3(-2000.0f,0.0f,0.0f));
             }
             //Also remember to do some damage
             _Player.curHealth -= 50;
         }
 
         //If it's a wall, make sure the rest of the script knows this
         if (obj.gameObject.tag == "Wall") 
             wallInTheWay = true;
 
         if (obj.gameObject.tag == "Lava")
             Destroy (this.gameObject);
     }
 
     //Make sure you know when you're no longer touching the wall
     private void OnCollisionExit2D(Collision2D obj)
     {
         if (obj.gameObject.tag == "Wall")
             wallInTheWay = false;
     }
 
     //Wall Logic - simple
     private IEnumerator WallMovement()
     {
         //This should do for now ... Plan on making it float back up later on
         RaycastHit2D rightWall = Physics2D.Raycast(this.gameObject.transform.position, Vector2.right, 5.0f);
 
         //If you hit a wall on the right
         if (rightWall)
             this.transform.Translate (-moveDistance, 0.0f, 0.0f);
 
         //Otherwise...
         else 
             this.transform.Translate (moveDistance, 0.0f, 0.0f);
 
         //And make sure you dont teleport/run back to the wall
         orgPos = this.transform.position.x;
 
         //ALWAYS!!
         yield return null;
     }
 
     //The actual scream, aim and fire logic
     private IEnumerator ScrAimFire()
     {
         yield return null;
     }
 }