an example of this is that herobrine only watches you on a hill or a mountain to make it much creepier or on trees even next to mountains if you know what i mean... make cave sounds become more commonly heard or more commonly spawned 5x3 pyrmaids and 2x2 caves. give herobrine a cummon cave sound like the femalish choir cave sound. idk what that cave sound is called but i don't wanna find ut because it is 12 AM right now and i want to have a goodnight sleep. or the gunshoot cave sound. make herobrine spawn behind 1x2 blocks. behind the block the player mine he will stand at a 1x2 space staring at the player. making the player scream and make him also uppear behind trees but if another player has the sight behind the tree he wont spawn. he will spawn behind the tree as soon the player starts chooping down the tree but this woun't happen very often just 15 times during a 4 hour gameplay or less. make herobrine spawn next to the end of the last chunk so you can see just the shadow of something that keeps coming closer to you. i got an idea about that. make herobrine come closer everythime you see him far away so he keeps coming closer and closer to the most nearby cliffs or mountains. add a enable and disable mod button so you don't need to remove it from the mod folder. make lightning strike herobrine sometimes when you see him. make a jukebox spawn in that plays the disc 11 theme. when the C418 soundtrack plays in minecraft it slowly getting creepier and creepier. make ghast sounds appear when herobrine is seen but will happen if you are lucky to hear it. make herobrine spawn pyrmaids even tho it is in the same chunk the whole time next to base or unlucky in the base. make steves into the game in that way you don't know who is or who are herobrines. then i mean if you go to close to one the steve will change his eyes from blue to glowing white and jumpscares the player. make strcutures and other thinks also spawn in the end and the nether. make herobrine appear at the end credits of the game at the very end for a couple frames and makes a ghast noice.
thats all i got for an upgraded version of the youtuber toiu's herobrine mod.