funneltrap

local function rise(nBlocks)
	for i=1,nBlocks do
		turtle.up()
	end
end

local function back(nBlocks)
	for i=1,nBlocks do
		turtle.back()
	end
end

local function left(nBlocks)
	turtle.turnLeft()
	if nBlocks == nil or nBlocks == 0 then
		return
	end
	for i=1,nBlocks do
		turtle.forward()
	end
end

local function right(nBlocks)
	turtle.turnRight()
	if nBlocks == nil or nBlocks == 0 then
		return
	end
	for i=1,nBlocks do
		turtle.forward()
	end
end

height = 3

shell.run("quadchute up ", height/3)
rise(height)
back(3)
left(4)
right(0)
shell.run("pattern funnel12")
right(0)
shell.run("walls 12 12 4")