I know there has to be a cleaner way to do this, and I could in Python in a single line, but I'm not sure how to simply write code in Construct. Regardless, this takes 1 event and some screen space. You could use the variables however you want, but this gives them the random amount at start of layout.
Example capx
{Edit:} Just refresh your browser when testing the layout to see the variable numbers change and you'll see that it works. I had to use int(random(1,10)) because it was giving me floats without the int() code, and you didn't ask how to get to the ten-thousandths of a random number between 1 and 10. <img src="smileys/smiley36.gif" border="0" align="middle">
Figured I'd post an example in case someone sees it and knows a better way, then we can both clean up our code a bit. <img src="smileys/smiley2.gif" border="0" align="middle">