help me check my code

i am just building up some code for a character controller for platform 2.5d, its only has left right direction and walk movement so far,but i am an artist not a coder so i am looking for someone who maybe able to look at what i have so far and give me some ideas on how it could be improved

Code (csharp):

1. var Speed : float = 4;
2. var gravity : float = 20.0;
3.  
4. var curDir : int = 2;
5. var lasDir : int = 2;
6. var inUse =0;
7.  
8. private var movement = Vector3.zero;
9. private var horizDir : float = 0;
10. private var thisTransform : Transform;
11. private var character : CharacterController;
12.  
13. function Start()
14. {
15.     thisTransform = GetComponent( Transform );
16.     character = GetComponent( CharacterController );   
17. }
18.  
19. function Update()
20. {
21.     charDirection();
22.     //  move the character 
23.     character.Move( movement );
24. }
25.  
26. function charDirection()
27. {
28.  
29. horizDir = Input.GetAxis("Horizontal");
30.  
31. if (horizDir < 0)
32.     curDir = -1;
33. else if (horizDir >0)
34.     curDir = 1;
35. else if (horizDir == 0)
36.     curDir = 0;
37.    
38. if (curDir != lasDir)
39. {
40.     if (horizDir > 0) // going right
41.         {
42.         transform.rotation = Quaternion.LookRotation(Vector3.forward);
43.         }  
44.     else if (horizDir <0) // going left
45.         {
46.         transform.rotation = Quaternion.LookRotation(-Vector3.forward);
47.         }
48.     else // last direction
49.         {
50.    
51.         }
52. lasDir = curDir;
53. }
54.  
55. movement = Vector3.right * Speed * horizDir;       
56. movement += Physics.gravity;
57. movement *= Time.deltaTime;
58.    
59. }
60.