how do you mean i dont get it

ive this peice of code but it doing nothing.

function camera_rearview()
{
while(player)
{
vec_set(camera.x, player.x); // copy player position to camera position
vec_set(camera.pan, player.pan); // copy player direction to camera direction
wait(1);
}
}

function camera_start()
{
view_mirror.x = 10; // X-Position in View = 10
view_mirror.y = 100; // Y-Position in View = 100
view_mirror.z = 0; // Z-Position in View = 0
}