Add Sega randomizer

tetris/randomizers/sega.lua

@@ -0,0 +1,19 @@
+local Randomizer = require 'tetris.randomizers.randomizer'
+
+local SegaRandomizer = Randomizer:extend()
+
+function SegaRandomizer:initialize()
+	self.bag = {"I", "J", "L", "O", "S", "T", "Z"}
+	self.sequence = {}
+	for i = 1, 1000 do
+		self.sequence[i] = self.bag[math.random(table.getn(self.bag))]
+	end
+	self.counter = 0
+end
+
+function SegaRandomizer:generatePiece()
+	self.counter = self.counter + 1
+	return self.sequence[self.counter % 1000 + 1]
+end
+
+return SegaRandomizer