simple 2x2 logger

function TreeTop()
  turtle.dig()
  turtle.forward()
while turtle.detectUp() do
  turtle.digUp()
  turtle.up()
   end
end
function TreeBot()
    while not turtle.detectDown() do
    turtle.down()
    end
end
TreeTop()
TreeBot()
TreeTop()
TreeBot()
turtle.turnRight()
TreeTop()
TreeBot()
turtle.turnRight()
TreeTop()
TreeBot()