finished basic wander with the cube. may need to edit once we have actual sprites..

Assets/AIScripts/wander.cs

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+using UnityEngine;
+using System.Collections;
+
+public class FlyingAI : MonoBehaviour {
+
+
+
+    public LayerMask enemyMask;
+    public float speed = 1;
+    Rigidbody2D myBody;
+    Transform myTrans;
+    float myWidth, myHeight;
+
+    // Use this for initialization
+    void Start()
+    {
+        myTrans = this.transform;
+        myBody = this.GetComponent<Rigidbody2D>();
+        SpriteRenderer mySprite = this.GetComponent<SpriteRenderer>();
+        myWidth = mySprite.bounds.extents.x;
+        myHeight = mySprite.bounds.extents.y;
+    }
+   
+	
+	// Update is called once per frame
+	void FixedUpdate ()
+    {
+
+        //check to see if there's ground in front of us before moving forward
+        Vector2 lineCastPos = myTrans.position.toVector2() - myTrans.right.toVector2() * myWidth + Vector2.up * myHeight;
+        lineCastPos.y = lineCastPos.y - (myHeight * 1.2f);
+        Debug.DrawLine(lineCastPos, lineCastPos + Vector2.down);
+        bool isGrounded = Physics2D.Linecast(lineCastPos, lineCastPos + Vector2.down, enemyMask);
+        Debug.DrawLine(lineCastPos, lineCastPos - myTrans.right.toVector2() * 0.05f);
+        bool isBlocked = Physics2D.Linecast(lineCastPos, lineCastPos - myTrans.right.toVector2() * 0.05f, enemyMask);
+
+        //if no ground turn around
+        if(!isGrounded || isBlocked)
+        {
+            Vector3 currentRot = myTrans.eulerAngles;
+            currentRot.y += 180;
+            myTrans.eulerAngles = currentRot;
+        }
+
+
+
+        //always move forward
+        Vector2 myVel = myBody.velocity;
+        myVel.x = -myTrans.right.x * speed;
+        myBody.velocity = myVel;
+	}
+
+}

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