farm

local function refuel()
        local fuelLevel = turtle.getFuelLevel()
        if fuelLevel == "unlimited" or fuelLevel > 20 then
                return
        end

        local function tryRefuel()
                for n=1,16 do
                        if turtle.getItemCount(n) > 0 then
                                turtle.select(n)
                                if turtle.refuel(1) then
                                        turtle.select(1)
                                        return true
                                end
                        end
                end
                turtle.select(1)
                return false
        end

        if not tryRefuel() then
                print( "Add more fuel to continue." )
                while not tryRefuel() do
                        sleep(1)
                end
                print( "Resuming Farming." )
        end
end

local function move()
	refuel()
    turtle.digDown()
	turtle.placeDown()
	while not turtle.forward() do
        if turtle.detect() then
            if not tryDig() then
                return false
            end
            elseif turtle.attack() then
                collect()
            else
				sleep( 0.5 )
            end
        end
        return true
end

local function move2()
	refuel()
	while not turtle.forward() do
        if turtle.detect() then
            if not tryDig() then
                return false
            end
            elseif turtle.attack() then
                collect()
            else
				sleep( 0.5 )
            end
        end
        return true
    end
end

local function plow()
    while not turtle.up() do
	    if turtle.detect() then
            if not tryDig() then
                return false
            end
			else
				sleep( 0.5 )
        end
	end
    move2()
    for o = 1,laenge do
        for i = 1,breite do
            move()
        end
        turtle.turnRight()
        move()
        turtle.turnRight()
        move()
        for i = 1,breite do
            move()
        end
        turtle.turnLeft()
        move2()
        turtle.turnLeft()
        move2()
        end
        for i = 1,breite do
            move()
        end
        move()
		while not turtle.down() do
			if turtle.detect() then
				if not tryDigDown() then
					return false
				end
				else
					sleep( 0.5 )
				end
			end
	end
	turtle.turnLeft()
    turtle.turnLeft()
end

local iRepeat = 0
    local iMin = 30
    local iCount = 0
    local spacer = ""
    while true do
            term.clear()
            term.setCursorPos(1,4)
            print("Fuel Remaning : "..tostring(turtle.getFuelLevel()))
            term.setCursorPos(1,1)
            iRepeat = iRepeat+1
            print("plowing   :"..iRepeat)
            plow()
            term.setCursorPos(1,4)
            print("Fuel Remaning : "..tostring(turtle.getFuelLevel()))
            iCount = iMin
            while true do
                    iCount = iCount-1
                    term.setCursorPos(1,2)
                    term.clearLine()
                    print("sleeping "..iMin.." minuites")
                    for i = 59,0,-1 do
                            sleep(1)
                            term.setCursorPos(1,3)
                            term.clearLine()
                            if i < 10 then
                                    spacer = "0"
                            else
                                    spacer = ""
                            end
                            write("To go    "..iCount..":"..spacer..i)
                    end
                    if iCount == 0 then
                            break
                    end
            end
    end