var

for x=1,10 do
for j=1,5 do
for i=1,4 do
turtle.dig()
turtle.forward()
end
if j==5 then
turtle.turnRight()
turtle.turnRight()
else
  if j%2==0 then
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.turnLeft()
    else
      turtle.turnRight()
      turtle.dig()
      turtle.forward()
      turtle.turnRight()
    end
  end
end
turtle.digDown()
turtle.down()
end