>>10874550If you're under 20 most likely there's nothing you can do rly, but if you're above, the first step is to identify and isolate yourself from everything that makes you horny, most likely 4Chan is one of them, the second step is to learn some self control, always remind yourself that the pleasure of porn is temporary and will bring no self fullfilment.
But don't overdoo it or it might "backfire", give a gap day to the process every 3-6 days.
Eventually your self controll will be the norm and you won't need to isolate yourself.