local component = require("component")
local compuer = require("computer")
local robot = require("robot")
local shell = require("shell")
local sides = require("sides")
turn=1

local args, options = shell.parse(...)
if #args < 1 then
 io.write("Useage: living  <stacks>\n")
 return
end

local size = tonumber(args[1])
if not size then
 io.stderr:write("invalid stack amount")
 return
end

local function swingFree()
 local tmp = robot.detect()
 while tmp == true do
  robot.swing()
  tmp = robot.detect()
 end
end

local function swingFreeDown()
 local tmp = robot.detectDown()
 while tmp == true do
  robot.swingDown()
  tmp = robot.detectDown()
 end
 robot.placeDown() --place new stone
end

--BLOCK OF WALK
for i=1, size*2 do --movement
 robot.select(1)
 robot.dropDown() --remove half stack
 robot.suckDown() --get full stone stack
 swingFree()
 robot.forward()
 for j=1, 6 do --lines
  for k=1, 5 do --blocks
   if j==1 or j==3 or j==4 or j==6 then --dig full lines
    swingFreeDown()
    swingFree() --prevent mob corruption
    robot.forward()
   else         --do not dig flowers
    if k==1 or k==3 or k==4 or k==6 then
     swingFreeDown()
     swingFree()
     robot.forward()
    else
     swingFree()
     robot.forward()
    end
   end
  end --blocks
  if j<6 then --do not turn on last line
   if (turn==1) then --goto next line right
    swingFreeDown()
    robot.turnRight()
    swingFree() --prevent mob corruption
    robot.forward()
    robot.turnRight()
   else              --goto next line left
    swingFreeDown()
    robot.turnLeft()
    swingFree() --prevent mob corruption
    robot.forward()
    robot.turnLeft()
   end
  end
 if turn==1 then turn=2 else turn=1 end
 end --lines
 swingFreeDown()
 robot.forward()
 robot.select(2)
 robot.dropDown() --remove living BLOCK
 robot.select(1)
 robot.turnRight()
 for a=1, 5 do swingFree() robot.forward() end
 robot.turnRight()
 os.sleep(15)
end --movement
print("finished")
os.execute("shutdown")