PA Digger

function outerRing()
x = 1
	turtle.digDown()
end
function place()
 	turtle.digUp()
	turtle.digDown()
end

for k = 1,4 do

  for i = 1,66 do
  	outerRing()
  	turtle.forward()
  end
  turtle.turnRight()
  end
  turtle.forward()
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.down()
  turtle.turnLeft()
for k = 1,4 do

  for i = 1,64 do
  	place()
  	turtle.forward()
  end
  turtle.turnRight()
 end
  turtle.forward()
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.up()
  turtle.turnLeft()
 for k = 1,4 do

  for i = 1,62 do
   outerRing()
  	turtle.forward()
  end
  turtle.turnRight()
 end