Two question ? " easy too "

hi

i want make same a counter , i have a dynamic text ant it name is “a” this text in the movie clip .
when i click the button the number of text will be increasing .
it,s numbler 0000 . and it has a borad . i want increase the number in the board of the text not …
in another meaning ; i want to make the text autosizeable …when increase the number

“” i can say this is same the visitor counter "

thanks thanks and bye