Hello guys aim stock whit my UI button...

aim creating a shooting game. you shoot instant if you hold down Input.GetButton "Fire1" = left ctrl. but i also want a Ui button to handle that if you play on a IOS device.
What I'm trying to do is. When you hold down my UI button. i want it to keep trigger Input.GetButton (Fire1);.

So simple.. I just want my button to instant trigger left ctrl if hold down.. so i can get the instant shoot effect..

Please help me out.. heres my script...

public class ShootButton : MonoBehaviour {

public void ImBeingPressed()