mine

rednet.open("right")

local n = 0
local n2 = 0

turtle.refuel()
term.clear()
term.setCursorPos(1,1)

while n < 56 do
  turtle.dig()
  turtle.digDown()
  turtle.down()
  turtle.dig()
  turtle.forward()
  turtle.turnLeft()
  n = n + 1
end

while n2 < 56 do
  turtle.turnRight()
  turtle.back()
  turtle.up()
  n2 = n2 + 1
end