steps = 100
layers = 55
for i = 1, layers, 1 do
  turtle.digDown()
  turtle.down()
end
for i = 1, step, 1 do
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
end
turtle.turnLeft()
turtle.turnLeft()
for i = 1, step, 1 do
  turtle.forward()
end
for i = 1, up, 1 do
  turtle.up()
end