MStairs2

-- This program digs a 5 x 5 stairwell
-- down to bedrock

function cut(blocks)
  for z = 1, blocks do
  turtle.dig()
  turtle.forward()
  end
  end

size = 5

for a = 1, size do
  turtle.digDown()
  turtle.down()
  cut(size - a)
    if (size - (a + 1)) > 0 then
      for b = 1, (size - (a + 1)) do
      turtle.back()
      end
    end
  end

turtle.turnRight()

for c = 1, (size - 1) do
   turtle.dig()
   turtle.forward()
   turtle.digUp()
   turtle.up()
   turtle.digUp()
   turtle.down()
   turtle.digDown()
   turtle.down()
   turtle.digDown()
   turtle.down()
   end