After you click the flag, a text box will open at the bottom of the page saying "What do you want the maximum number to be?" In that box where you can type, type the maximum number that the generator will select. If you type 100, the generator will select a random number between 1 and 100. After you have imputed the number, click the check and the box should disappear. Then click "Generate Number!" to tell the computer to display the number. You can continue to click the generate button multiple times if you want several numbers. Click "Reset" to erase the list and number displayed in "ul". You will need to input a new maximum number after doing so.
Used lists, a variable and some basic blocks. I created it to make myself more familiar with lists and displaying variables.