фундамент

function refuelIfNeeded()
    local fuel = turtle.getFuelLevel();
    if fuel<160 then
        local prev_slot = turtle.getSelectedSlot();
        turtle.select(16);
        turtle.refuel(math.ceil(fuel/80));
        turtle.select(prev_slot);
    end

end

function checkFindSlot(item_name)
    if  turtle.getItemCount()==0 or turtle.getItemDetail().name ~= item_name then
        for i=1,16,1 do
            turtle.select(i);
            if  turtle.getItemCount()~=0 and turtle.getItemDetail().name == item_name then
                return true;
            end

        end
        error("no blocks found");
    end

end

function checkedPlace(item_name)
    checkFindSlot(item_name);
    turtle.placeDown();
end

function checkedForward()
    refuelIfNeeded();
    if turtle.getFuelLevel()==0 then error("failed to refuel") end
    turtle.forward();
end


function drawLine(n)

    for i = 1,n-1,1 do

        checkedPlace(BLOCK);

        checkedForward();
    end

    checkedPlace(BLOCK);
end

turtle.select(1);

BLOCK = turtle.getItemDetail().name;

print(BLOCK);

SIZE = 5;

for row_number = 1,SIZE,1 do
    drawLine(SIZE);

    if row_number==SIZE then break; end

    if row_number%2==1 then
        turtle.turnRight();
        checkedForward();
        turtle.turnRight();
    else
        turtle.turnLeft();
        checkedForward();
        turtle.turnLeft();
    end
end