strip.lua

local component = require("component")
local robot = component.proxy(component.list("robot")())

local square = 5
local depth = 0
local good = true

function dumpInventory()
  print("Inventory Full. Dumping to Chest")
  robot.select(1)
  robot.place(1)
  for i = 2, 16 do
    robot.select(i)
    robot.drop(1)
  end
  robot.select(1)
  robot.swing(1)
  robot.select(2)
end

function checkInventory()
  if robot.space(16) < 64 then
    dumpInventory()
  end
end

-- strip mine down
while good do
for i=1, square do
  for j=1, square-1 do
    robot.swing(3)
    robot.move(3)

    checkInventory() -- Check every swing to make sure nothing is lost
  end

  robot.turn(i % 2 == 0)
  if i < 5 then
    robot.swing(3)
    robot.move(3)
  end
  robot.turn(i % 2 == 0)
  end
  robot.swing(0)
  if robot.detect(0) then -- if it hit bedrock
    good = false
  else
    robot.move(0)
    depth = depth+1
  end
end

if depth % 2 == 0 then -- If on the opposite corner
  for i = 1, square-1 do
    robot.move(3)
  end
  robot.turn(false)
  for i = 1, square-1 do
    robot.move(3)
  end
end

-- Move back up
for i = 1, depth do
  robot.move(1)
end
robot.turn(false) -- Final left turn to face original