farmer

function pathfind(block)
	if block.name == "minecraft:oak_planks" then  -- turn right
			turtle.turnRight()
			turtle.forward()
			turtle.turnRight()
	elseif block.name == "minecraft:spruce_planks" then  -- turn left
			turtle.turnLeft()
			turtle.forward()
			turtle.turnLeft()
	elseif block.name == "minecraft:oak_slab" then  -- skip water
			turtle.turnRight()
			turtle.forward()
			turtle.forward()
			turtle.turnRight()
	elseif block.name == "minecraft:spruce_slab" then  -- skip water
			turtle.turnLeft()
			turtle.forward()
			turtle.forward()
			turtle.turnLeft()
	elseif block.name == "minecraft:stone" then -- go home
			goHome()
	end
end


function goHome()
	turtle.turnRight()
	turtle.up()
	turtle.up()
	turtle.up()
	home = false
	while not home do
		turtle.forward()
		bool, block = turtle.inspect()
		if bool then
			home = true
		end
	end
	dumpAll()
	turtle.turnRight()
	turtle.down()
	turtle.down()
	turtle.down()
	sleep(60*19)  -- minecraft day is 20 minutes
end

function dumpAll()
	for i=2,16 do
		turtle.select(i)
	    while turtle.getItemCount() > 0 do
	    	turtle.drop()
	    end
	end
	turtle.select(1)
end

function makeMove()
	bool, blockForward = turtle.inspect()
		if bool then
			pathfind(blockForward)
		else
			turtle.forward()
		end
end

while true do
	bool, blockDown = turtle.inspectDown()
	if not bool then
		turtle.placeDown()
		makeMove()
	elseif blockDown.state.age == 7 then
		turtle.digDown()
		turtle.placeDown()
		makeMove()
	else
		makeMove()
	end
end