quarry

local function checkFuel()
    if turtle.getFuelLevel() < 1 then
        turtle.select(1)
        turtle.refuel(1)
    end
end

local function invCheck()
    if turtle.getItemCount(16) ~= 0 then
        turtle.select(2)
        while turtle.detectUp() do
            turtle.digUp()
        end
        turtle.placeUp()

        for i=3, 16 do
            turtle.select(i)
            turtle.dropUp()
        end
        turtle.select(3)
    end
end

local function moveForward()
    checkFuel()
    turtle.digUp()
    turtle.digDown()
    while turtle.forward() == false do
        turtle.dig()
        turtle.attack()
        invCheck()
    end
end

print("Welcome at the program for easy ores and minerals!")
print("Go stand on y = 14 when F3 is pressed.")
print("Jump up and place turtle under you.")
print("Put a stack of fuel in the first slot, put the output enderchest in the second slot and put the fuel input chest in the third slot.")
print(" ")
print("The turtle will stop when you unload the chunks, when you logout and when the turtle is terminated.")
print("After you put in all the slots that are described earlier, press ENTER to start.")
while read()=="" do

    while true do
        for i=1, 4 do
            for j=1, 15 do
                moveForward()
            end
            if i~= 4 then
                turtle.turnLeft()
                turtle.turnLeft()
                turtle.digUp()

                for k=1, 3 do
                    checkFuel()
                    while turtle.down() == false do
                        turtle.digDown()
                        turtle.attackDown()
                        invCheck()
                    end
                end
            end
        end
        turtle.turnLeft()
        moveForward()
        turtle.turnLeft()
        for l=1, 9 do
            checkFuel()
            while turtle.up() == false do
                turtle.digUp()
                turtle.attackUp()
                invCheck()
            end
        end
    end
end