digdownV2

function ChkFuel()
 if turtle.getFuelLevel() == 0 then
  turtle.select(1)
  if turtle.refuel(1) == true then
   write('Dozapravke na ')
   write(x)
   write('x')
   print(y)
  end
 end
end

function Fwd(Int)
 a = 0
 while a < Int do
  turtle.dig()
  ChkFuel()
  turtle.forward()
  a = a + 1
 end
end

function Turn(Bool)
  if Bool == true then
  turtle.turnRight()
  Fwd(1)
  turtle.turnRight()
  return false
 else
  turtle.turnLeft()
  Fwd(1)
  turtle.turnLeft()
  return true
  end
end

function down()
 turtle.digDown()
 turtle.down()
 turtle.turnLeft()
 turtle.turnLeft()
end

print('Vvedite Shiriny')
mX = tonumber(read())
print('Vvedite glubinu')
mY = tonumber(read())

x=0
y=0

Fwd(1)
turtle.turnLeft()
Fwd(mX/2)
turtle.turnRight()
for c=1, 3 do
 turtle.digUp()
 turtle.up()
end


turn = true


while y < mY+3 do
 if y > 0 then
  down()
 end
 x = 0
 while x < mX do
  Fwd(mX)
  x = x + 1
   if x ~= mX then
    turn = Turn(turn)
   end
  end
 y = y + 1
end

for b=0, mY-1 do
  turtle.digUp()
  turtle.up()
end