Mobcontroller

local choice
local sList = {colors.blue, colors.green, colors.red, colors.white}

function centerText(text)
	local x,buf1 = term.getSize()
	local buf2,y = term.getCursorPos()
	term.setCursorPos(math.ceil((x / 2) - (text:len() / 2)), y)
	print(text)
end

function choose()
	term.clear()
	term.setCursorPos(1,1)
	term.setTextColor(colors.lightBlue)
	centerText("Cambridge Corp. Spawner Controller")
	print("")
	centerText("Chose your spawner")
	print("1: Zombie Pigman")
	print("2: Creeper")
	print("3: Skeleton")
	print("4: Slime")
	print("5: Chicken")
	print("6: Cow")
	print("7: Sheep")
	choice = read()
	choice = tonumber(choice)
end

function run()
	term.clear()
	term.setCursorPos(1,1)
	redstone.setBundledOutput("back", sList[choice])
	centerText("Starting spawner...")
	print("Press any key to stop the spawner!")
	read()
	redstone.setBundledOutput("back",0)
end

while true do
	choose()
	if (choice <= table.getn(sList)) and choice > 0 then
	run()
	end
end