debugging - Dynamic Random number glitch -

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for project, http://www.swfcabin.com/swf-files/1302575829.swf, number doesn't appear when "scratch" top part off. code being used (yes it's little nooby, i'm new @ this)

{      zoom = random (20) +1;      gotoandplay(2); }

how can make number appears every time? thanks! -zach

ps: actionscript2

use floor method , multiplication:

math.floor(math.random() * 20) + 1;

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