How to fix sleep schedule

Guys mera sleep schedule kaafi zyada fucked up hai 3-4 baje tak jaag kar 11-12 baje uthta hu ek dinn 4 baje sokey 7 baje utha tha aur 9 bajey sokey agle din 10 baje utha tho staying up all day and sleeping at night wla method kam nhi kiya mere liye koi aur kuch suggestion dedo 12-7 karna hai sleep schedule ko