View difference between Paste ID: Zm3RcQVK and vUPN9dCa

 local t = turtle
 
 local function forward(x)
 	for i = 1, x do
 		t.forward()
 	end
 end
 
 local function rTurn(x)
 	for i = 1, x do
 		t.turnRight()
 	end
 end
 
 local function lTurn(x)
 	for i = 1, x do
 		t.turnLeft()
 	end
 end
 
 local function up(x)
 	for i = 1, x do
 		t.up()
 	end
 end
 
 local function down(x)
 	for i = 1, x do
 		t.down()
 	end
 end
 
 local function back(x)
 	for i = 1, x do
 		t.back()
 	end
 end
 
 local function gotoStart()
 	rs.setAnalogOutput("left", 0)
 	os.sleep(1)
 	up(2)
 	back(1)
 	lTurn(1)
 	forward(1)
 end
 
 local function rowUp()
 	for i = 1, 4, 1 do
 		t.dig()
 		up(1)
 	end
 end
 
 local function rowDown()
 	for i = 1, 4, 1 do
 		t.dig()
 		down(1)
 	end
 end
 
 local facing = t.detect()
 
 local height = t.detect(down)
 
 local function harvest(x)
 	for i = 1, x do
 		rTurn(1)
 			if facing == true and height == true then
 				rowUp()
 			else
 				rowDown()
 			end
 	end
 			elseif facing == false and height == true then
 				forward(1)
 				lTurn(1)
 				rowUp()
 			else
 				forward(1)
 				lTurn(1)
 				rowDown()
 			end
 	end
 end
 
 local function gotoHome()
 	back(2)
 	lTurn(1)
 	forward(1)
 	down(5)
 	os.sleep(1)
 	rs.setAnalogOutput("left", 15)
 	os.sleep(3600)
 end
 
 while true do
 	gotoStart()
 	rowUp()
 	harvest(6)
 	gotoHome()
 end