cobble12

local start = os.clock();

function step1()
  for i = 1, 6 do
    turtle.suck();
  end
end
function step2()
  turtle.refuel(1);
  turtle.turnLeft();
  turtle.digDown();
  turtle.down();
  turtle.dig();
  turtle.forward();
  turtle.turnLeft();
  turtle.digDown();
  turtle.dig();
  turtle.forward();
  turtle.digDown();
end
function step3()
  turtle.up();
  turtle.up();
  turtle.turnRight();
  turtle.forward();
  turtle.turnLeft();
--  turtle.forward();
end
function step4()
--  turtle.select(2);
--  turtle.placeUp();
--  turtle.back();
  turtle.select(3);
  turtle.placeUp();
--  turtle.select(2);
  turtle.back();
--  turtle.place();
--  turtle.select(4);
--  turtle.placeUp();
  turtle.select(2);
  turtle.back();
--  turtle.place();
  turtle.placeUp();
end
function step5()
  turtle.back();
  turtle.turnLeft();
  turtle.forward();
  turtle.forward();
  turtle.forward();
  turtle.turnRight();
  turtle.forward();
  turtle.forward();
  turtle.down();
end

function step6()
  turtle.digDown();
  turtle.select(4);
  turtle.placeDown();
end

function step7()
  turtle.select(2);
  turtle.forward();
  turtle.place();
  turtle.turnLeft();
--  turtle.place();
  turtle.turnLeft();
  turtle.place();
  turtle.select(5);
  turtle.up();
  turtle.placeDown();
end

function step8()
  turtle.forward();
  turtle.select(2);
  turtle.place();
  turtle.turnRight();
  turtle.place();
  turtle.turnRight();
  turtle.place();
  turtle.select(6);
  turtle.turnLeft();
  turtle.back();
  turtle.place();
end
function step9()
  turtle.dropDown();
  for i = 1, 8 do
    if turtle.getItemCount(i) > 0 then
      turtle.select(i);
      turtle.drop();
    end
  end
end

function step10()
  turtle.down();
  turtle.turnRight();
end

function build()
  local bS = os.clock();
  step1();
  step2();
  step3();
  step4();
  step5();
  step6();
  step7();
  step8();
  step9();
  step10();
  local bE = os.clock();
  print("Build Time: " .. (bE - bS));
end

function dropOff(reset)
  turtle.turnLeft();
  turtle.turnLeft();
  for i = 1, 16 do
    if turtle.getItemCount(i) > 0 then
      turtle.select(i);
      turtle.drop();
    end
  end
  if reset then
    turtle.turnLeft();
    turtle.turnLeft();
  end
end

function collect(amt)
  local cS = os.clock();
  local targ = amt or (12 * 64);
  local total = 0;
  local c = {
    "Up",
    "",
    "Down"
  };
  while total < targ do
    for i = 1, #c do
      if turtle["dig" .. c[i]]() then
        total = total + 1;
        if total >= targ then
          break;
        end
        if total == 14 * 64 then
          dropOff(true);
        end

      end
    end
  end
  dropOff();
  local cE = os.clock();
  print("Collection Time: " .. (cE - cS));
end

function run(amount)
  build();
  collect(amount);
end

run(12 * 64);

print("Total Time: " .. (os.clock() - start));