t1

function u(col)
  for i=1,col do
    turtle.digUp()
    turtle.up()
    turtle.placeDown()
  end
end

function f(col)
  for i=1,col-1 do
    turtle.placeDown()
    turtle.dig()
    turtle.forward()

  end
end

u(3)
f(2)
u(4)
f(2)
u(5)
f(2)
u(1)
f(2)
u(1)
f(2)
u(5)
f(2)
u(5)
f(7)
u(4)
f(2)
u(5)
f(2)
u(6)
f(2)
u(7)
f(2)
u(7)
f(2)
u(7)