I like to create (slide) presentation that automatically appears each "word" or "character" one by one from left to right with a specific speed (without using "\pause" pressing each time the bottom "space" key), which seems that I am writing on a sheet of paper when I explain something to a student. I want to use this feature, if exist, for teaching math purpose.
I hope I could explain what I meant. If not please let me know.
Let me give an example:
Let $a,b,c>0$. assume the quadratic equation $$ ax^2+bx+c=0. $$
Now I like to have PDF output being start with the word "Let" after some mili-seconds "a," again after some mili-seconds $b,$ then "c" and so on.
For instance I want the above example takes one minute (less or more) to finish the slide and wait for me to command to go for the next page.
I uploaded a recorded video from what I meant one part is separated by word the other by character. I used too many
command to get this :(