Changing the alpha for dynamic text

i’m trying to change the alpha for a dynamic text box, i’ve look through lots of tutorials and none of them work, they get me about half way there. can some one help please?

i’m using fl.transitions to control everything, but i’m have mental issues with this textbox

HELP!

also

can any one help me to find the simplest way to get text out of a text file (*txt) in to a textbox? also i would like to be able to interchange the text? every tutorial i read seem to read over complicates it.

thanks you.