function forwardtest()
   while true do
      if not turtle.forward() then
         turtle.back()
         break
      end
   end
end

function aircheck()
   for z=1,8 do
      turtle.down()
   end
end

function forwardturn()
   while true do
      if not turtle.forward() then
         turtle.turnLeft()
         break
      end
   end
end

function drop()
   turtle.select(16)
   turtle.digDown()
   for d=1,14 do
      turtle.select(d)
      turtle.dropDown()
   end
   turtle.select(16)
   turtle.placeDown()
end

function cut()
   turtle.dig()
   turtle.forward()
   while true do
      if turtle.digUp() then
      turtle.up()
      else if not turtle.down() then
      turtle.turnLeft()
      break
      end
   end
end
end

function movetodrop16trees()
   for g=1,6 do
      turtle.back()
   end
end

function check4trees()
  if turtle.getFuelLevel()<175 then
     refuel()
   end
end

function check16trees()
  if turtle.getFuelLevel()<600 then
     refuel()
   end
end

function refuel()
   turtle.select(16)
   turtle.turnRight()
   turtle.turnRight()
   turtle.suck()
   turtle.refuel(64)
   turtle.select(1)
   turtle.turnLeft()
   turtle.turnLeft()
end

function plant()
   turtle.select(14)
   turtle.place()
   turtle.select(1)
end

function getsaplings()
   turtle.select(14)
   turtle.turnRight()
   turtle.suck()
   turtle.select(1)
   turtle.turnLeft()
end

function getbonemeal()
   turtle.select(15)
   turtle.up()
   turtle.turnRight()
   turtle.suck()
   turtle.select(1)
   turtle.turnLeft()
   turtle.down()
end

function bonemeal()
   turtle.select(15)
   turtle.place()
   turtle.place()
   turtle.place()
   turtle.place()
   turtle.select(1)
end


while true do
   refuel()
   saplings()
   getbonemeal()
   turtle.forward()
   plant()
   bonemeal()
   cut()
   othermove()
   turtle.turnRight()
   turtle.back()
   plant()
   bonemeal()
   cut()
   othermove()
   othermove()
   turtle.turnRight()
   turtle.back()
   plant()
   bonemeal()
   cut()
   othermove()
   turtle.forward()
   turtle.forward()
   plant()
   bonemeal()
   cut()
   othermove()
   othermove()
   drop()
   turtle.up()
   turtle.turnRight()
   turtle.select(15)
   turtle.drop()
   turtle.turnLeft()
   turtle.down()
   sleep(130)
end