function state_rules()

	local fade = split"0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,4,9,10,9,4,2,1"
	local color = 1

	local function blink(x,y,w,h)
		rect2(x,y,w,h,fade[color])
	end

	local function go_back()
		set_state(states.menu)
	end

	local btn_back = make_button({x=1, y=118, w=30, h=7, text="❎menu", color=8,
		on_click=function() go_back() end,
		on_hover=function(btn) btn.color = 7 end})

	return {
		_update=function()
			if frame_count%8==0 then
				color += 1
			end
			if color>#fade then
				color = 1
			end

			-- Back to the menu
			if btnp(BTN_X) then
				go_back()
			end

			btn_back:update()
		end,

		_draw=function()
			cls()
			custom_font()

			print("1) yOU CAN'T HAVE MORE THAN\n   TWO (2) CONSECUTIVE TILES\n   OF THE SAME COLOR", 2,2, 7)
			local x = 14
			local y = 28
			sspr(0,32, 12,12, x,y)
			spr(2, x+14, y+1)
			sspr(13,32, 12,12, x+26,y)
			blink(x-1, y-1, 9, 3)
			blink(x+25, y-1, 9, 3)
			blink(x-1, y+8, 12, 3)
			blink(x+25, y+8, 12, 3)

			x = 75
			sspr(26,32, 12,12, x,y)
			spr(2, x+14, y+1)
			sspr(39,32, 12,12, x+26,y)
			blink(x+5, y+2, 3, 9)
			blink(x+31, y+2, 3, 9)


			--------------

			x = 44
			y = 50
			print("2) eACH LINE CONTAINS AN EQUAL\n   NUMBER OF EACH COLOR", 2, y, 7)
			sspr(52,32, 12,12, x,y+20)
			spr(2, x+14, y+21)
			sspr(65,32, 12,12, x+26,y+20)
			blink(x+5, y+22, 6, 3)
			blink(x+31, y+22, 6, 3)
			blink(x-1, y+19, 3, 6)
			blink(x+25, y+19, 3, 6)

			--------------

			x = 44
			y = 90
			print("3) aLL ROWS AND COLUMNS\n   ARE DIFFERENT", 2, y, 7)
			sspr(78,32, 12,12, x,y+20)
			spr(2, x+14, y+21)
			sspr(91,32, 12,12, x+26,y+20)
			blink(x-1, y+25, 12, 6)
			blink(x+25, y+25, 12, 6)

			--------------

			btn_back:draw()
		end,
	}
end