Old dig

X=0
Y=0
while X<40 do
  turtle.dig()
  turtle.digDown()
  turtle.digUp()
  turtle.forward()
  X=X+1
end
turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnRight()
while Y<40 do
  turtle.dig()
  turtle.digDown()
  turtle.digUp()
  turtle.forward()
  Y=Y+1
end