View difference between Paste ID: seyTaa0k and cxH2chZx

 local characters = {"`","1","2","3","4","5","6","7","8","9","0","-","=",
   "q","w","e","r","t","y","u","i","o","p","[","]","\\",
   "a","s","d","f","g","h","j","k","l",";","'",
   "z","x","c","v","b","n","m",",",".","/",
   "~","!","@","#","$","%","^","&","*","(",")","_","+",
   "Q","W","E","R","T","Y","U","I","O","P","{","}","|",
   "A","S","D","F","G","H","J","K","L",":",'"',
   "Z","X","C","V","B","N","M","<",">","?"
 }
 local disabled = {}
 
 local digitnum = 18
 
 while true do
   local code = ""
   term.clear()
   term.setCursorPos(1,1)
   term.setTextColor(colors.white)
   if #characters > 0 then
     for h=1,#characters do
       write(characters[h]..", ")
     end
   end
 
   term.setTextColor(colors.gray)
   if #disabled > 0 then
     for h=1,#disabled do
       write(disabled[h]..", ")
     end
   end
   term.setTextColor(colors.white)
   print("\n")
   print("Press any key to enable/disable the character or click on any option below.\n")
 
   print("Digits: <"..digitnum..">")
   print("Generate Code")
   print("Exit\n")
 
   local event, button, xPos, yPos = os.pullEvent()
   if event == "char" then
     for g=1,94 do
       if button == characters[g] then
         table.insert(disabled, 1, characters[g])
         table.remove(characters, g)
       elseif button == disabled[g] then
         table.insert(characters, 1, disabled[g])
         table.remove(disabled, g)
       end
     end
 
   elseif event == "key" then
     if button == 203 then
       if digitnum > 1 then
         digitnum = digitnum - 1
       end
     elseif button == 205 then
       digitnum = digitnum + 1
     end
   elseif event == "mouse_click" then
     if xPos >= 1 and xPos <= 13 and yPos == 12 then
       if #characters > 0 then
         for i=1,digitnum do
           local t = math.ceil(math.random(1,#characters))
           code = code..characters[t]
         end
 
         print(code)
 
       else
         print("Can't generate a code. All characters are disabled.")
       end
 
       print("\nPress any button to continue.")
-      local event = os.pullEvent()
+      local event = os.pullEvent("key")
 
     elseif xPos >= 1 and xPos <= 4 and yPos == 13 then
       break
     elseif xPos == 9 and yPos == 11 then
       if digitnum > 1 then
         digitnum = digitnum - 1
       end
     elseif xPos == 9+string.len(tostring(digitnum))+1 and yPos == 11 then
       digitnum = digitnum + 1
     end
   end
 end
 
 shell.run("clear")