while true do

turtle.select(1)
if turtle.detect() == false then
	turtle.turnLeft()
	turtle.place()
	turtle.turnRight()
	turtle.turnRight()
	turtle.place()
	turtle.turnLeft()
	turtle.forward()
end

if turtle.detect() == true then
	turtle.place()
	turtle.turnRight()
	turtle.turnRight()
	turtle.forward()
end
end