line

local arg = { ... }
function forward(n)
  for k=1,n,1 do
    while turtle.forward() == false do
      turtle.dig()
    end
  end
end
function step()
  turtle.dig()
  forward(1)
  turtle.digUp()
end
for n=1,arg[1],1 do
  step()
end
turtle.turnLeft()
turtle.turnLeft()
forward(arg[1])