3run I think you already made that.
Look at the codes in youre webside.
But do you meen it like this?;

action move_pan_with_mouse_guy()
{
player = my;
set (my, INVISIBLE);

vec_set (camera.x, player.x);
camera.z += 35;
camera.pan -= 6 * mouse_force.x * time_step;
player.pan = camera.pan;
wait (1);
}
}

Red is the colure youre looking for

Random