while true do
turtle.select(15)
if turtle.getItemCount() < 32 then
  turtle.turnLeft()
  turtle.forward()
  turtle.drop()
  sleep(0.5)
  turtle.suck()
  turtle.back()
  turtle.turnRight()
end
turtle.select(16)
if turtle.getItemCount() < 32 then
  turtle.turnRight()
  turtle.forward()
  turtle.drop()
  sleep(0.5)
  turtle.suck()
  turtle.back()
  turtle.turnLeft()
end

turtle.forward()
turtle.select(15)
turtle.place()
turtle.select(15)
u=true
repeat
  turtle.select(16)
  u=turtle.place() 
until u==false

turtle.select(1)
turtle.dig()
turtle.forward()
z=true
repeat
  turtle.digUp()
  turtle.up()
  z=turtle.compareUp()
until z==false

repeat
  turtle.down()
  u=turtle.detectDown()
until u==true

turtle.turnLeft()
turtle.turnLeft()
turtle.forward()
turtle.forward()
for i = 1, 14, 1 do
  turtle.select(i)
  turtle.drop()
end

turtle.turnRight()
turtle.turnRight()

end