guard2

s = peripheral.wrap("left")
dir=0
x,y,z=nil

function turnRight()
  turtle.turnRight()
  dir=dir+1
  define()
end

function turnLeft()
  turtle.turnLeft()
  dir=dir-1
  define()
end

function turnAround()
  turnRight()
  turnRight()
end

function define()
  if (dir > 3) then
    dir=dir-4
  elseif (dir < 0) then
    dir=dir+4
  end
end

function move()
    if (dir == 0) then
      if (z > 1.5) then
        turtle.forward()
      elseif (z < -1.5) then
        turnAround()
      elseif (x < -1.5) then
        turnRight()
      elseif (x > 1.5) then
        turnLeft()
      end
    elseif (dir == 1) then
      if (x < -1.5) then
        turtle,forward()
      elseif (x > 1.5) then
        turnAround()
      elseif (z > 1.5) then
        turnLeft()
      elseif (z < -1.5) then
        turnRight()
      end
    elseif (dir == 2) then
      if (z > 1.5) then
        turnAround()
      elseif (z < -1.5) then
        turtle.forward()
      elseif (x < -1.5) then
        turnLeft()
      elseif (x > 1.5) then
        turnRight()
      end
    elseif (dir == 3) then
      if (x < -1.5) then
        turnAround()
      elseif (x > 1.5) then
        turtle.forward()
      elseif (z > 1.5) then
        turnRight()
      elseif (z < -1.5) then
        turnLeft()
      end
    end
end

function turnToAttack()
    if (dir == 0) then
        if (z > 0 and z < 1.5 and x < 1.5 and x > -1.5) then
            turtle.attack()
        elseif (x < 0 and x > -1.5 and z < 1.5 and z > -1.5) then
            turnLeft()
            turtle.attack()
        elseif (x > 0 and x < 1.5 and z < 1.5 and z > -1.5) then
            turnRight()
            turtle.attack()
        end
    elseif (dir == 1) then
        if (x < 0 and x > -1.5 and z < 1.5 and z > -1.5) then
            turtle.attack()
        elseif (z > 0 and z < 1.5 and x < 1.5 and x > -1.5) then
            turnLeft()
            turtle.attack()
        elseif (z < 0 and z > -1.5 and x < 1.5 and x > -1.5) then
            turnRight()
            turtle.attack()
        end
    elseif (dir == 2) then
        if (z < 0 and z > -1.5 and x < 1.5 and x > -1.5) then
            turtle.attack()
        elseif (x < 0 and x > -1.5 and z < 1.5 and z > -1.5) then
            turnRight()
            turtle.attack()
        elseif (x > 0 and x < 1.5 and z < 1.5 and z > -1.5) then
            turnLeft()
            turtle.attack()
        end
    elseif (dir == 3) then
        if (x > 0 and x < 1.5 and z < 1.5 and z > -1.5) then
            turtle.attack()
        elseif (z < 0 and z > -1.5 and x < 1.5 and x > -1.5) then
            turnLeft()
            turtle.attack()
        elseif (z > 0 and z < 1.5 and x < 1.5 and x > -1.5) then
            turnRight()
            turtle.attack()
        end
    end
end

while true do
  id = s.getMobIds()[1]
  if not (id == nil) then
    pos = s.getMobData(id).position
    x = pos.x
    y = pos.y
    z = pos.z

    move()
    turnToAttack()
  end
end