treegrid

dist = 13
d12 = 12
function movetwo()
	turtle.forward()
	turtle.forward()
end

function movethree()
	turtle.forward()
	turtle.forward()
	turtle.forward()
end

function cuttree()
	turtle.dig()
	turtle.forward()
		while turtle.detectUp() do
			turtle.digUp()
			turtle.up()
			end
		while not turtle.detectDown() do
		turtle.down()
		end
	end

function back()
	turtle.turnLeft()
	turtle.turnLeft()
	for n=1, dist do
	turtle.forward()
	end
end

function home()
	turtle.turnLeft()
		for n=1, d12 do
		turtle.forward()
	end
end

function empty()
	for i=16,2,-1 do
	turtle.select(i)
	turtle.dropDown()
	end
end

function cutgrid()
	cuttree()
	movethree()
	cuttree()
	movethree()
	cuttree()
	movethree()
	cuttree()
end

function nextline()
	turtle.turnRight()
	movethree()
	turtle.forward()
	turtle.turnRight()
end

function planttree()
	turtle.forward()
	turtle.turnLeft()
	turtle.place()
	turtle.turnRight()
end

function plantline()
	planttree()
	movetwo()
	planttree()
	movetwo()
	planttree()
	movetwo()
	planttree()
	back()
end

function plantgrid()
	plantline()
	nextline()
	plantline()
	nextline()
	plantline()
	nextline()
	plantline()
	home()
end

cutgrid()
back()
nextline()
cutgrid()
back()
nextline()
cutgrid()
back()
nextline()
cutgrid()
back()
home()
empty()
turtle.turnleft()
turtle.select(1)
plantgrid()