Computercraft Sugar Cane Harvester Program

Blocks = 0
Blocks1 = 0

    function Main()
        MovePattern()
        DropCane()
        if 20 > turtle.getFuelLevel() then
                turtle.select(1)
            if 1 > turtle.getItemCount(1) then
                turtle.suckUp()
            end
            turtle.refuel(1)
        end
        sleep(180)
        Blocks = 0
        Blocks1 = 0
        Main()
    end

    function DropCane()
        turtle.select(2)
        turtle.drop()
        turtle.select(3)
        turtle.drop()
        turtle.select(4)
        turtle.drop()
        turtle.select(5)
        turtle.drop()
        turtle.select(6)
        turtle.drop()
        turtle.select(7)
        turtle.drop()
        turtle.select(8)
        turtle.drop()
        turtle.select(9)
        turtle.drop()
        turtle.select(10)
        turtle.drop()
        turtle.select(11)
        turtle.drop()
        turtle.select(12)
        turtle.drop()
        turtle.select(13)
        turtle.drop()
        turtle.select(14)
        turtle.drop()
        turtle.select(15)
        turtle.drop()
        turtle.select(16)
        turtle.drop()
    end

    function MovePattern()
        turtle.turnRight()
        turtle.turnRight()
        TurtleForward(8)
        turtle.turnRight()
        turtle.turnRight()
        TurtleForwardN(7)
        turtle.forward()
    end

    function TurtleForward(a)
        if Blocks < a then
            turtle.forward()
            turtle.turnLeft()
            turtle.dig()
            turtle.turnRight()
            turtle.turnRight()
            turtle.dig()
            turtle.turnLeft()
            Blocks = Blocks + 1
            TurtleForward(a)
        end
    end

    function TurtleForwardN(a)
        if Blocks1 < a then
        turtle.forward()
        Blocks1 = Blocks1 + 1
        TurtleForwardN(a)
    end
end

Main()