Nim proc issues

#create my first proc

proc mainMenu() =
  echo("1) Print hello")

  input = readLine(stdin)

  if input == "1":
    echo ("hello")
  else:
    echo("not an option")

# create my second proc

proc menuTwo() =
  echo("1) return to main menu")
  option = readLine(stdin)

  if option == "1":
    mainMenu()
  else:
    echo("Not an option")