local r = require("robot")
local component = require("component")
local ge = component.geolyzer
local x = 1
local y = 1
local z = 1
local yh = 1
local g = component.generator

function xup()
	while x < 41 do
  scan()
		if r.swing() == true then
      repeat
        r.swing()
      until r.swing() == false
    else
      if r.forward() == true then
        x = x+1
      end
    end
	end
end

function xdown()
  while x > 1 do
  scan()
    if r.swing() == true then
      repeat
        r.swing()
      until r.swing() == false
    else
      if r.forward() == true then
        x = x-1
      end
    end
  end
end

function yup()
  while yh < 4 do
  scan()
    if r.swing() == true then
      repeat
        print("dig")
        r.swing()
      until r.swing() == false
    else
      if r.forward() == true then
        yh = yh+1
        y = y+1
        print("y=")
        print(y)
        print("yh=")
        print(yh)
      end
    end
  end
  yh = 1
  print("y=")
  print(y)
  print("yh=")
  print(yh)
end

function drop()
  local selectedSlot = r.select()
  r.select(1)
  r.drop(r.count() - 1)
  r.select(2)
  r.drop(r.count() - 1)
  r.select(3)
  r.drop(r.count() - 1)
  print("drop")
end

function scan()
  print("scan")
  if ge.analyzer(1).hardness > 1.5 then
  r.swing(1)
  end
  if ge.analyzer(0).hardness > 1.5 then
  r.swing(0)
  end
  if ge.analyzer(4).hardness > 1.5 then
  r.turnRight()
  r.swing()
  r.turnLeft()
  end
  if ge.analyzer(5).hardness > 1.5 then
  r.turnLeft()
  r.swing()
  r.turnRight()
  end

end
-- program main

while y < 41 do
  xup()
  r.turnRight()
  yup()
  drop()
  r.turnRight()
  xdown()
  r.tutnLeft()
  yup()
  drop()
  r.turnLeft()
end