blackboard

do
mon = peripheral.wrap("right")
mon.setCursorPos(1,0)
mon.clear()
print("Welcome to BlackBoard!")
print("Type in anything and it will display on the monitor.")
print("Have fun!")
while true do
 local input = read()
 if input == "(:clearscreen" then
  print("Clearing screen...")
  sleep(1)
  mon.clear()
  mon.setCursorPos(1,0)
 else
  if input == "(:clearline" then
   print("Clearing line...")
   sleep(1)
   mon.clearLine()
   currx, curry = mon.getCursorPos()
   mon.setCursorPos(1, curry - 1)
  else
   if input == "help" then
    print("Tip: Type '(:' before a command for it to work.")
    print("COMMANDS:")
    print("clearline - clears the line you just typed.")
    print("clearscreen - clears the whole screen.")
    print("exit - exits BlackBoard.")
   else
    if input == "(:exit" then
     print("Thank you for using BlackBoard!")
     sleep(0.5)
     mon.clear()
     error()
    else
     currx, curry = mon.getCursorPos()
     mon.setCursorPos(1, curry + 1)
     mon.write(input)
    end
   end
  end
 end
end
end