Buttons to make 2d character to move left and right

Does anyone know how to script so that 2d character can move left and right using left or right button? I have made the movements to work but the buttons doesn't seem to work. help asap

 

Code (CSharp):

1. float h = Input.GetAxisRaw("Horizontal"); //Movement Variable
2.          
3.             //Movement Controls
4.             rb.velocity = new Vector2(moveSpeed * h, rb.velocity.y);        
5.             if (h > 0) //when its more than 0 it will face right
6.             {          
7.                 transform.localScale = new Vector3(1, 1, 1);            
8.             }
9.             else if (h < 0) //when its less than 0 it will face left
10.             {
11.                 transform.localScale = new Vector3(-1, 1, 1);            
12.             }
13.             rb.velocity = new Vector2(moveSpeed * h, rb.velocity.y);

this script helps control my movement of the 2d character.