function follow_portal()
  -- replace "User" with the name of the user you want to follow
  local user = "User"

  -- replace "Portal" with the name of the portal
  local portal = "Portal"

  -- check if the user is in the same room
  if msdp.Room and msdp.Room.People then
    for _, person in ipairs(msdp.Room.People) do
      if person == user then
        -- if the user is in the same room, check if the portal is there too
        if msdp.Room.Items then
          for _, item in ipairs(msdp.Room.Items) do
            if item.Name == portal then
              -- if the portal is there, move through it
              send("enter " .. portal)
              return
            end
          end
        end
        cecho("<green>Couldn't find " .. portal .. " in this room.</green>\n")
        return
      end
    end
  end
  cecho("<green>Couldn't find " .. user .. " in this room.</green>\n")
end

-- bind the function to a key for easy access
-- replace "Ctrl-p" with the key combination you want to use
-- replace "Follow Portal" with the name you want to give to this functionality
-- you can also choose to bind it to a button instead of a key
function follow_portal_keypress()
  follow_portal()
end
bindKey("Ctrl-p", "Follow Portal")