Need coding help with fps

I need help. I have a gun, and I want to make it so that when the player presses the left mouse button, it shoots a ray from the player in the direction the camera is facing, and if the ray hits an object with the "Shootable" tag, it creates a bullethole object (a small plane with a bullethole material on it) on the surface of the object it hit. I am really new to javascript, so I need the code that would do what I need, the tag being "Shootable".

The code needs to:

Shoot a ray from the camera in the direction the camera/player is facing create a bullethole object on the surface of what the ray hit

When the mouse button, or "Fire1" is pressed.