while true do
 print("go go go")
 turtle.dig()
 turtle.forward()
 height=0
 cont=true
 while cont do
  cont = turtle.dig()
  turtle.digUp()

  turtle.up()
  height=height+1
 end
 height=height-1
 turtle.turnLeft()
 turtle.dig()
 turtle.forward()
 turtle.turnRight()
 for i=0,height do
  turtle.dig()
  turtle.digDown()
  turtle.down()
 end
 turtle.dig()
 turtle.up()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.turnRight()
 turtle.forward()
 turtle.placeDown()
 turtle.turnRight()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.down()
 turtle.turnLeft()
 for j=2,16 do
  turtle.select(j)
  turtle.drop()
 end
 turtle.turnLeft()
 print("done!")

 turtle.select(1)
 print("wait for next tree")
 n = true
 while n do
  redstone.setOutput("right", true)
  redstone.setOutput("right", false)
  n = turtle.compare()
  sleep(2)
 end
end