The Ddiary ¶
. This is an old diary.

You could also say "The diary. It is an old diary."

The book iwas covered in the dust of time, I blew ithem all away, a. As I blew away a light curtain, I saw the lock on the side of the diary,. I forgot the password and I did. I was not happy to waste my time to thinking about the password of a dumb diary, so I ripped it savagely, like a primitive beast.

"As I blew away a light curtain" I'm not quite sure what you are trying to say by this, do you mean the wind blowing a curtain, or something else? Also, be sure to keep in the same tense!

wWhat I saw iwas only a white page, another white page, and countless white pages, — just like my blank mind—but without the fury,. I did not understand why people try to lock something that has no thing.

When using past tense, be sure to use "was" instead of "is" :)

I stopped breathing— how it was possible? My heart became as blue as the ink.

She had set up the password thrillingly, wonderthinking that mom and dad would never have discovered her secret, but she forgot to consider a more evil enemy, o. One who would destroy everything aggressively, one who would use any means to achieve her purposes, who lacks kindness and guilt.

This time, I statred at the pale pages, they had never been this powerful,. I could hear the crying, blame, shout,. I eventually lowered my head, although this would never help.

Everyone's childhood is lived by another person,; one who is pure, happy, kind, o. One who concentrates all the beautiful humanities.

I closed the diary, slight dust flipped into my fingertips.

plz help me with literary writing TT

Could also use "Please" instead of "plz".

The Diary ¶
This i¶
It was an old diary.

Since you haven't spoken about the diary yet, you would introduce it first with "it" in this situation, rather than "this".

The book iwas covered in the dust of time,. I blew ithem all away, and as I blew away athe light curtain of dust, I saw thea lock on the side of the diary,. I had forgotten the password and I did not happywant to waste my time to thinking about the password of a dumb diary, so I ripped it savagely, like a primitive beast.

"Trying to remember" could also work more naturally and add more detail instead of "thinking about".

wWhat I saw iwas only a white page, another white page, and countless more white pages, —just like my blank mind—, but without the fury,. I did not understand why people would try to lock something that has no thing in it.

I turned it over to the cover, and unexpectedly, the name "Tina" was written in dark blue ink.

I stopped breathing— how it was this possible? My heart became as blue as the ink.

I finally sawJust then, I remembered something,. I flashed back to a little girl holding a book, with the exact same pink, and the exact same lock as the one I ruined.

"Just then" improves the link between your previous sentence to this one.

Assuming by "flash back" you mean in your memory, then "remembered" could work better for clarification. If you didn't mean in terms of memory you could keep using "saw".

If the "finally" usage meant after a long time you saw something, then you could say "After a long time, I finally remembered something"

She set up the password thrillingly, wonderwith a thrill, thinking that mom and dad would never discovered her secret, but she forgot to consider a more evil enemy, — one who would destroy everything aggressively, one who would use any means to achieve her purposes, who lacks kindness and guilt.

It doesn't feel natural to use "Thrillingly" to describe a state of being/feeling like this. You could instead also say "She set up the password with a thrill of excitement", or "She set up the password excitedly".

Yes, she is still Tina, but the grown-up Tina.

The empty diary had not a single word, the girl had vanished, reborn as someone who tears open secrets without remorse.

This time, I statred at the pale pages theyat had never been this powerful, before. I could hear the crying, blame,ing and shout,ing. I eventually lowered my head, although this would never help.

"This time" might not be necessary.

Everyone's childhood is lived by another person, one who is pure, happy, and kind,; one who concentrates all the beautiful parts of humanitiesy.

Concentrates doesn't really work here, instead you could say "one who is made up of all the beautiful parts of humanity", or "one who brings together all the beautiful parts of humanity".

So I made thisa decision,: the decision to find the old me.

I closed the diary, slight dust fliped into my fingertips.

I am not quite sure what word you mean here with "fliped". You could say "slight dust underneath my fingertips" or "slight dust coming off my fingertips" depending on what you mean.