Turtle Farm

local waitTime = 20

function dropAll()
    for x=1,16 do
            turtle.select(x)
            turtle.dropDown()
        end
end

function getFuel()
    while (turtle.getFuelLevel() < 1000) do
        turtle.select(1)
        if turtle.suckUp() then
            turtle.refuel()
        else
            print('No Fuel Found - Waiting 20 seconds')
            os.sleep(20)
        end
        dropAll()
    end
end

while true do
        turtle.digDown()

        turtle.forward()

        if turtle.detect() then

        if rs.getInput("front") then
            dropAll()
            getFuel()
            sleep(waitTime)
        end

            turtle.turnLeft()
        end
end