move player with button problem

when i use this function with button , player change his position one time
i use this function with event trigger.

public void right(){
		this.transform.localPosition += transform.right * oxspeed * Time.deltaTime;

Why cant you just use

  if ( Input.GetKey(KeyCode.RightArrow) )
    //move right

You can change the input options in the Input menu from WASD to the arrow keys.
In your script you can also listen for specific keys, like so:

  if ( Input.GetKey(KeyCode.UpArrow) )
    //move up
  if ( Input.GetKey(KeyCode.DownArrow) )
    //move down
  if ( Input.GetKey(KeyCode.RightArrow) )
    //move right
  if ( Input.GetKey(KeyCode.LeftArrow) )
    //move left