MSfollower

local followChannel = 14
local followRespChannel = 15
local modem = peripheral.wrap("right")
modem.open(followChannel)

commands = {
    follow_Up = function()
        turtle.up()
    end,
    follow_Down = function()
        turtle.down()
    end,
    follow_Forward = function()
        turtle.forward()
    end,
    follow_Backward = function()
        turtle.back()
    end,
    follow_Left = function()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
    end,
    follow_Right = function()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
    end,
}

while true do
  local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")
  print(message)

  if string.find(string.lower(message), "follow_") then
  --if ( (string.len(op.name) > 7) and (string.find(op.name, "follow_", nil, true) ~= nil) ) then
    commands[message]()
    modem.transmit(followRespChannel ,followChannel ,"Following OK")
  end
end