underscore typewriter effect tutorial | after effects

hello!! ♡
this is a very popular after effects text effect tutorial! hope this helps you :)
the expression is in the pinned comments section! credits to @motionhub on yt, however I've tweaked the expression a bit :)
Please comment any issues or video requests in the comments below and ill try my best to work on them!
thanks, xx
program: after effects cc 2020
computer: macbook pro 16 inch 16GB ram

[@lcv3lies]

X = text.sourceText;
F = Math.round(time * BlinkSpeed % 1);
L = X.length;
T = time * Speed - Start * Speed;
Cursor = " ";
if (F==1 | T>0) Cursor = "|";
if (T>=L) Cursor = " ";
if (T>0) X.substr(0,T) + Cursor
else Cursor

[@lcv3lies]

here is the expression guys!!! credits to motionhub but modified by me :)

[@chloeg3890]

how did you even figure this out

[@harrysociedad1002]

it doesn't work i followed every step and it does nothing

[@fruitea424]

tysm for this !! rlly helpful

[@talia744]

is there a way for the underscore to stay even after the text is finished typing?

[@babyje9]

Tysm!❤️

[@auroramp4.-quit473]

10 mins early ly

[@speedified]

How do i precompose it without it turning back to normal

[@scop8036]

how to add a square instead the "I" or "_" ?

[@alexandra-zl8de]

hey can you please post the expression? thanks !!!!

[@lovesick.k]

what's the name of the effect at 0:18??

[@mapliie]

omg. marry me now ur a lifesaver