[1.0] Turtle Chicken Farm

turtle.select(1)
local menu_options = { --This is our menu table. It contains basic data about the menu
  [1] = {text="Kill Mob mode", color=colors.red},
  [2] = {text="Breeding mode", color=colors.green},
  [3] = {text="!!! ADMIN !!!", color=colors.cyan}
}
local termX, termY = term.getSize() --The x/y size of the terminal
local function menuDraw(selected) --Our main draw function
  local yPos = termY/2 - #menu_options/2 --The initial y position
  for index, data in pairs(menu_options) do
	menu_options[index].bounds = { --Create a new table in each option with the boundary data
	  x1 = termX/2 - (#data.text+4)/2;
	  x2 = termX/2 + (#data.text+4)/2;
	  y = yPos;
	}
	term.setTextColor(data.color)
	term.setCursorPos(data.bounds.x1, data.bounds.y)

	local text =
	  index==selected and "[ "..data.text.." ]" or
	  "  "..data.text.."  " --Essentially an if statement, but in a contracted form
	term.write(text)
	yPos = yPos+1 --Increment the initial y pos so we can move on the next line
  end
end

local function checkClick(x,y) --Check the mouse click to see if there's a menu option
  for index, data in pairs(menu_options) do
	if x>= data.bounds.x1 and x<= data.bounds.x2 and y==data.bounds.y then
	  return index --Returns the index of the clicked option
	end
  end
  return false --If it went through the entire for loop without success, return false
end

term.clear()

local selector = 1 --Our selector
while true do --The main loop. I would generally put this inside of a function for a program.
  menuDraw(selector) --Draw the menu first
  local e = {os.pullEvent()} --Pull an event and put the returned values into a table
  if e[1] == "key" then --If it's a key...
	if e[2] == keys.down then -- ... and it's the down arrow
	  selector = selector < #menu_options and selector+1 or 1 --Increment the selector if the selector < #menu_options. Otherwise reset it to 1
	elseif e[2] == keys.up then
	  selector = selector > 1 and selector-1 or #menu_options --Decrement the selector if the selector > 1. Otherwise, reset it to #menu_options
	elseif e[2] == keys.enter then
	  break --Break out of the loop
	end
  elseif e[1] == "mouse_click" then
	local value = checkClick(e[3], e[4]) --Check the mouse click
	if value then --If checkClick returns a value and not false
	  selector = value --Set the selector to that value and break out of the loop
	  break
	end
  end
end

fs.delete("fmode")

file = fs.open("fmode", "wb")

if selector == 1 then
  file.write(1)
elseif selector == 2 then
  file.write(2)
elseif selector == 3 then
  file.write(3)
end

file.close()
--shell.run("ASelection")
os.reboot()

if fs.exists("fmode") then
  shell.run("ASelection")
else
  shell.run("control")
end

while true do
  for i = 1, 15 do
	turtle.select(i)
	if (turtle.compareTo(16)) then
	  turtle.dropUp()
	else
	  turtle.drop()
	end
  end
  sleep(15)
end