4 Wood Farmer

t=turtle

t.select(16)
	for i=1, 4 do
		t.place()
		t.turnRight()
end
t.up()

turtle.select(15)
turtle.refuel(5)

print("The fuel level is: "..turtle.getFuelLevel())

while 1 == 1 do
turtle.select(15)
turtle.refuel(5)

print("The fuel level is: "..turtle.getFuelLevel())
	if not turtle.detect() then
		os.sleep(5)
		t.turnRight()
	else
		t.down()
		t.dig()
		t.forward()
		h=0
    	while turtle.detectUp() do
       		h=h+1
        	t.digUp()
			t.up()
    	end
    	for i=1, h do
        t.down()
		end

		t.back()
		t.select(16)
		t.place()
		t.up()
		t.turnRight()
    end

end