tree

turtle.refuel()
turtle.dig()
turtle.forward()
for j = 0,1,1 do
h = 1
while turtle.detect() == true do
  turtle.digUp()
  turtle.up()
  h = h + 1
end
turtle.forward()
for i=h-2,0,-1 do
  turtle.digDown()
  turtle.down()
end
turtle.back()
turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnRight()
end
turtle.dropDown()
turtle.back()
turtle.turnRight()
turtle.forward()
turtle.forward()
turtle.turnLeft()