dig.lua

function forward(stp)
 for c=1,stp do
  while turtle.detect() do
  turtle.dig()
  sleep(1)
  end
 turtle.forward()
 turtle.digUp()
 turtle.digDown()
 end
end

function tleft(stp)
 for c=1,stp do
 turtle.turnLeft()
 end
end

function tright(stp)
 for c=1,stp do
 turtle.turnRight()
 end
end


forward(6)
tleft(1)
forward(2)
tleft(1)
forward(4)
tleft(1)
forward(4)
tleft(1)
forward(4)
tleft(1)
forward(3)
tleft(1)
forward(3)
tleft(1)
forward(2)
tleft(1)
forward(2)
tleft(1)
forward(1)
tleft(1)
forward(5)

turtle.up()