diff --git a/load/graphics.lua b/load/graphics.lua
index c12cac7..b527e0d 100644
--- a/load/graphics.lua
+++ b/load/graphics.lua
@@ -49,6 +49,18 @@ blocks = {
 		F = love.graphics.newImage("res/img/bone.png"),
 		A = love.graphics.newImage("res/img/bone.png"),
 		X = love.graphics.newImage("res/img/bone.png"),
+	},
+	["gem"] = {
+		R = love.graphics.newImage("res/img/gem1.png"),
+		O = love.graphics.newImage("res/img/gem3.png"),
+		Y = love.graphics.newImage("res/img/gem7.png"),
+		G = love.graphics.newImage("res/img/gem6.png"),
+		C = love.graphics.newImage("res/img/gem2.png"),
+		B = love.graphics.newImage("res/img/gem4.png"),
+		M = love.graphics.newImage("res/img/gem5.png"),
+		F = love.graphics.newImage("res/img/gem9.png"),
+		A = love.graphics.newImage("res/img/gem9.png"),
+		X = love.graphics.newImage("res/img/gem9.png"),
 	}
 }
 
diff --git a/res/img/gem1.png b/res/img/gem1.png
new file mode 100644
index 0000000..04ea2a9
Binary files /dev/null and b/res/img/gem1.png differ
diff --git a/res/img/gem2.png b/res/img/gem2.png
new file mode 100644
index 0000000..9c0f357
Binary files /dev/null and b/res/img/gem2.png differ
diff --git a/res/img/gem3.png b/res/img/gem3.png
new file mode 100644
index 0000000..4578705
Binary files /dev/null and b/res/img/gem3.png differ
diff --git a/res/img/gem4.png b/res/img/gem4.png
new file mode 100644
index 0000000..88b0187
Binary files /dev/null and b/res/img/gem4.png differ
diff --git a/res/img/gem5.png b/res/img/gem5.png
new file mode 100644
index 0000000..701e49d
Binary files /dev/null and b/res/img/gem5.png differ
diff --git a/res/img/gem6.png b/res/img/gem6.png
new file mode 100644
index 0000000..7f16200
Binary files /dev/null and b/res/img/gem6.png differ
diff --git a/res/img/gem7.png b/res/img/gem7.png
new file mode 100644
index 0000000..225a22a
Binary files /dev/null and b/res/img/gem7.png differ
diff --git a/res/img/gem9.png b/res/img/gem9.png
new file mode 100644
index 0000000..7277ccb
Binary files /dev/null and b/res/img/gem9.png differ
diff --git a/tetris/components/grid.lua b/tetris/components/grid.lua
index 38d3044..f6eab5a 100644
--- a/tetris/components/grid.lua
+++ b/tetris/components/grid.lua
@@ -273,6 +273,26 @@ function Grid:checkSecretGrade()
 	return sgrade
 end
 
+function Grid:hasGemBlocks()
+	for y = 1, 24 do
+		for x = 1, 10 do
+			if self.grid[y][x].skin == "gem" then
+				return true
+			end
+		end
+	end
+	return false
+end
+
+function Grid:applyMap(map)
+	for y, row in pairs(map) do
+		for x, block in pairs(row) do
+			self.grid_age[y][x] = 0
+			self.grid[y][x] = block
+		end
+	end
+end
+
 function Grid:update()
 	for y = 1, 24 do
 		for x = 1, 10 do
diff --git a/tetris/modes/sakura.lua b/tetris/modes/sakura.lua
new file mode 100644
index 0000000..51a928d
--- /dev/null
+++ b/tetris/modes/sakura.lua
@@ -0,0 +1,350 @@
+require 'funcs'
+
+local GameMode = require 'tetris.modes.gamemode'
+local Piece = require 'tetris.components.piece'
+
+local History6RollsRandomizer = require 'tetris.randomizers.history_6rolls_35bag'
+
+local SakuraGame = GameMode:extend()
+
+SakuraGame.name = "Sakura Beta"
+SakuraGame.hash = "SakuraBeta"
+SakuraGame.tagline = "Test mode for gem blocks"
+
+local b = {
+    ["r"] = { skin = "2tie", colour = "R" },
+    ["o"] = { skin = "2tie", colour = "O" },
+    ["y"] = { skin = "2tie", colour = "Y" },
+    ["g"] = { skin = "2tie", colour = "G" },
+    ["c"] = { skin = "2tie", colour = "C" },
+    ["b"] = { skin = "2tie", colour = "B" },
+    ["m"] = { skin = "2tie", colour = "M" },
+    ["R"] = { skin = "gem", colour = "R" },
+    ["O"] = { skin = "gem", colour = "O" },
+    ["Y"] = { skin = "gem", colour = "Y" },
+    ["G"] = { skin = "gem", colour = "G" },
+    ["C"] = { skin = "gem", colour = "C" },
+    ["B"] = { skin = "gem", colour = "B" },
+    ["M"] = { skin = "gem", colour = "M" },
+}
+
+local maps = {
+    [1] = {
+        [22] = {nil, nil, b.O, b.R, nil, nil, b.M, b.m, nil, nil},
+        [23] = {nil, b.G, b.c, b.c, b.c, b.c, b.c, b.c, b.Y, nil},
+        [24] = {nil, b.C, b.y, b.y, b.y, b.y, b.y, b.y, b.B, nil},
+    },
+    [2] = {
+        [20] = {nil, nil, nil, nil, b.G, b.b, b.b, b.M, nil, nil},
+        [21] = {nil, nil, nil, nil, b.c, b.c, b.c, b.c, nil, nil},
+        [22] = {nil, nil, nil, nil, nil, b.R, b.Y, b.O, nil, nil},
+        [23] = {nil, b.B, b.c, b.c, b.c, b.c, b.c, b.c, b.c, nil},
+        [24] = {nil, b.b, b.b, b.b, b.b, b.b, b.b, b.b, b.C, nil},
+    },
+    [3] = {
+        [20] = {nil, nil, nil, b.R, b.m, b.o, b.M, nil, nil, nil},
+        [21] = {nil, nil, nil, nil, b.o, b.O, nil, nil, nil, nil},
+        [22] = {nil, nil, nil, nil, b.G, b.Y, nil, nil, nil, nil},
+        [23] = {nil, b.m, b.o, b.m, b.o, b.m, b.o, b.m, b.o, nil},
+        [24] = {nil, b.B, b.m, b.o, b.m, b.o, b.m, b.o, b.C, nil},
+    },
+    [4] = {
+        [21] = {nil, nil, b.O, b.g, b.g, b.g, b.g, nil, nil, nil},
+        [22] = {nil, nil, nil, b.R, b.M, b.b, b.b, nil, nil, nil},
+        [23] = {b.G, nil, b.Y, b.g, b.g, b.g, b.g, b.g, nil, nil},
+        [24] = {b.b, b.C, b.b, b.b, b.b, b.b, b.b, b.b, b.B, nil},
+    },
+    [5] = {
+        [16] = {nil, b.B, b.c, b.y, b.c, b.G, b.c, b.y, b.C, nil},
+        [22] = {nil, nil, b.c, b.y, b.c, b.y, b.c, b.y, nil, nil},
+        [23] = {nil, b.O, b.y, b.c, b.y, b.c, b.y, b.c, b.Y, nil},
+        [24] = {nil, b.R, b.c, b.y, b.c, b.y, b.c, b.y, b.M, nil},
+    },
+    [6] = {
+        [21] = {nil, nil, nil, nil, b.O, b.Y, nil, nil, nil, nil},
+        [22] = {nil, nil, b.R, nil, b.b, b.y, nil, b.M, nil, nil},
+        [23] = {nil, nil, nil, nil, b.y, b.b, nil, nil, nil, nil},
+        [24] = {nil, b.G, b.y, b.b, b.C, b.y, b.b, b.y, b.B, nil},
+    },
+    [7] = {
+        [20] = {nil, b.C, b.G, nil, b.r, b.g, b.r, b.g, nil, nil},
+        [21] = {nil, nil, nil, nil, b.R, b.M, b.g, b.r, nil, nil},
+        [22] = {b.r, nil, nil, nil, b.r, b.g, b.O, b.Y, nil, nil},
+        [23] = {b.g, b.r, b.g, b.r, b.g, b.r, b.g, b.r, nil, nil},
+        [24] = {b.r, b.g, b.r, b.g, b.r, b.g, b.r, b.g, b.B, nil},
+    },
+    [8] = {
+        [15] = {nil, nil, nil, b.B, b.m, b.m, b.m, b.m, b.m, b.C},
+        [16] = {nil, nil, nil, nil, nil, nil, nil, nil, nil, b.m},
+        [17] = {nil, nil, nil, nil, nil, nil, nil, nil, nil, b.m},
+        [18] = {nil, b.Y, b.y, b.y, b.y, b.y, b.y, b.y, b.y, b.G},
+        [21] = {b.b, b.b, b.b, b.b, b.b, b.b, b.O, nil, nil, nil},
+        [22] = {b.b, nil, nil, nil, nil, nil, nil, nil, nil, nil},
+        [23] = {b.M, nil, nil, nil, nil, nil, nil, nil, nil, nil},
+        [24] = {b.o, b.o, b.o, b.o, b.o, b.o, b.o, b.o, b.R, nil},
+    },
+    [9] = {
+        [18] = {nil, nil, nil, b.Y, b.m, b.m, b.m, b.m, nil, nil},
+        [19] = {nil, nil, nil, b.c, b.c, b.c, b.c, b.G, nil, nil},
+        [20] = {b.m, b.m, b.m, b.O, b.M, b.R, nil, nil, nil, nil},
+        [21] = {b.c, b.c, b.c, b.c, b.c, b.c, b.c, b.c, nil, nil},
+        [22] = {b.m, b.m, b.m, b.m, b.m, b.m, b.m, b.m, nil, nil},
+        [23] = {b.c, b.c, b.c, b.c, b.c, b.c, b.c, b.c, b.C, nil},
+        [24] = {b.m, b.m, b.m, b.m, b.m, b.m, b.m, b.m, b.B, nil},
+    },
+    [10] = {
+        [18] = {nil, nil, nil, b.C, b.g, b.g, b.B, nil, nil, nil},
+        [19] = {nil, nil, b.G, b.g, b.g, b.g, b.g, b.Y, nil, nil},
+        [20] = {nil, b.M, b.g, b.g, b.g, b.g, b.g, b.g, b.O, nil},
+        [21] = {nil, nil, nil, nil, b.c, nil, nil, nil, nil, nil},
+        [22] = {nil, nil, nil, nil, b.c, nil, nil, nil, nil, nil},
+        [23] = {nil, nil, nil, nil, b.c, nil, b.o, nil, nil, nil},
+        [24] = {nil, nil, nil, nil, b.R, b.o, b.o, nil, nil, nil},
+    },
+    [11] = {
+        [18] = {nil, nil, nil, nil, b.o, b.o, nil, nil, nil, nil},
+        [19] = {nil, nil, nil, nil, b.R, nil, nil, nil, nil, nil},
+        [20] = {nil, nil, nil, nil, b.r, b.O, nil, nil, nil, nil},
+        [21] = {nil, nil, nil, nil, nil, b.M, nil, nil, nil, nil},
+        [22] = {nil, nil, nil, nil, b.o, b.o, nil, nil, nil, nil},
+        [23] = {nil, nil, nil, nil, b.G, b.Y, nil, nil, nil, nil},
+        [24] = {b.C, b.g, b.g, nil, b.o, b.o, nil, b.g, b.g, b.B},
+    },
+    [12] = {
+        [21] = {nil, nil, nil, nil, nil, nil, nil, b.g, b.g, b.Y},
+        [22] = {nil, nil, b.r, b.G, b.r, nil, nil, nil, b.O, b.g},
+        [23] = {nil, b.r, b.C, b.r, b.B, b.r, nil, nil, nil, b.M},
+        [24] = {b.r, b.r, b.r, b.R, b.r, b.r, b.r, nil, nil, nil},
+    },
+    [13] = {
+        [20] = {b.c, nil, nil, nil, nil, nil, nil, nil, nil, b.B},
+        [21] = {b.c, b.c, nil, nil, nil, nil, nil, nil, b.C, b.c},
+        [22] = {b.c, b.c, b.c, nil, nil, nil, nil, b.G, b.c, b.c},
+        [23] = {b.b, b.b, b.b, b.b, nil, nil, b.Y, b.b, b.b, b.b},
+        [24] = {nil, b.M, b.b, b.b, b.b, b.O, b.b, b.b, b.R, nil},
+    },
+    [14] = {
+        [20] = {nil, nil, nil, b.y, b.r, b.y, nil, nil, nil, nil},
+        [21] = {b.R, nil, nil, b.Y, b.y, b.r, b.G, nil, nil, nil},
+        [22] = {nil, nil, nil, b.y, b.r, b.y, b.r, b.y, b.r, b.B},
+        [23] = {nil, nil, nil, nil, nil, nil, nil, b.O, b.y, b.r},
+        [24] = {nil, nil, nil, nil, nil, nil, b.M, b.y, b.r, b.C},
+    },
+    [15] = {
+        [17] = {nil, nil, b.b, nil, nil, nil, nil, b.b, nil, nil},
+        [18] = {nil, nil, b.b, b.y, b.b, b.b, b.y, b.b, nil, nil},
+        [19] = {nil, nil, nil, b.y, b.b, b.b, b.y, nil, nil, nil},
+        [20] = {nil, nil, nil, nil, b.O, b.Y, nil, nil, nil, nil},
+        [22] = {nil, nil, nil, nil, b.M, b.R, nil, nil, nil, nil},
+        [23] = {nil, nil, nil, b.G, b.y, b.y, b.C, nil, nil, nil},
+        [24] = {nil, nil, b.B, b.y, b.y, b.y, b.y, b.y, nil, nil},
+    },
+    [16] = {
+        [18] = {nil, nil, b.O, nil, nil, nil, nil, b.B, nil, nil},
+        [19] = {nil, nil, b.c, nil, nil, b.G, nil, b.c, nil, nil},
+        [20] = {nil, nil, b.c, nil, b.C, b.R, nil, b.c, nil, nil},
+        [21] = {nil, nil, b.c, nil, nil, nil, nil, b.c, nil, nil},
+        [22] = {nil, nil, b.Y, b.c, b.c, b.c, b.c, b.M, nil, nil},
+    },
+    [17] = {
+        [15] = {b.O, nil, nil, b.g, nil, nil, b.m, nil, nil, b.Y},
+        [16] = {nil, nil, nil, b.g, nil, nil, b.m, nil, nil, nil},
+        [17] = {nil, nil, nil, b.g, nil, nil, b.R, nil, nil, nil},
+        [18] = {nil, nil, nil, b.g, nil, nil, b.m, nil, nil, nil},
+        [19] = {nil, nil, nil, b.M, nil, nil, b.m, nil, nil, nil},
+        [20] = {nil, nil, nil, b.g, nil, nil, b.m, nil, nil, nil},
+        [21] = {nil, nil, nil, b.g, nil, nil, b.G, nil, nil, nil},
+        [22] = {nil, nil, nil, b.g, nil, nil, b.m, nil, nil, nil},
+        [23] = {nil, nil, nil, b.g, nil, nil, b.m, nil, nil, nil},
+        [24] = {nil, b.m, b.m, b.m, b.B, b.C, b.g, b.g, b.g, nil},
+    },
+    [18] = {
+        [19] = {nil, nil, nil, b.y, b.B, b.y, b.y, nil, nil, nil},
+        [20] = {nil, nil, b.y, nil, nil, nil, nil, b.y, nil, nil},
+        [21] = {nil, b.o, nil, nil, b.C, b.R, nil, nil, b.O, nil},
+        [22] = {nil, b.M, nil, nil, b.Y, b.G, nil, nil, b.o, nil},
+        [23] = {nil, b.r, b.o, nil, nil, nil, nil, b.o, b.r, nil},
+        [24] = {nil, b.r, b.r, b.o, b.o, b.o, b.o, b.r, b.r, nil},
+    },
+    [19] = {
+        [15] = {nil, nil, nil, nil, nil, nil, b.O, nil, nil, nil},
+        [16] = {nil, nil, nil, nil, nil, b.o, nil, nil, nil, nil},
+        [17] = {nil, nil, nil, nil, b.o, b.r, b.o, nil, nil, nil},
+        [18] = {nil, b.o, nil, nil, b.o, b.r, b.r, b.o, nil, nil},
+        [19] = {nil, b.o, b.o, nil, nil, b.R, b.r, b.r, nil, nil},
+        [20] = {nil, nil, b.M, b.r, nil, b.r, b.r, b.r, b.r, nil},
+        [21] = {nil, nil, b.r, b.r, b.r, b.r, b.y, b.G, b.o, b.o},
+        [22] = {nil, b.r, b.o, b.y, b.Y, b.y, b.y, b.y, b.y, b.o},
+        [23] = {nil, b.o, b.o, b.y, b.y, b.c, b.c, b.c, b.c, b.C},
+        [24] = {nil, nil, b.o, b.y, b.b, b.b, b.B, b.b, b.b, b.b},
+    },
+    [20] = {
+        [20] = {nil, nil, b.B, b.b, b.b, b.b, b.b, b.b, nil, nil},
+        [21] = {b.c, nil, nil, b.C, b.c, b.c, b.c, nil, nil, b.c},
+        [22] = {b.g, b.g, nil, nil, b.G, b.g, nil, nil, b.g, b.g},
+        [23] = {b.y, b.y, b.o, nil, nil, nil, nil, b.Y, b.y, b.y},
+        [24] = {b.r, b.r, b.r, b.R, nil, nil, b.M, b.r, b.r, b.r},
+    },
+}
+
+function SakuraGame:new()
+    self.super:new()
+
+    self.randomizer = History6RollsRandomizer()
+    
+    self.current_map = 1
+    self.time_limit = 10800
+    self.cleared_frames = 300
+    self.stage_frames = 0
+    self.time_extend = 0
+    self.grid:applyMap(maps[self.current_map])
+    
+    self.lock_drop = true
+    self.lock_hard_drop = true
+    self.enable_hold = true
+    self.next_queue_length = 3
+end
+
+function SakuraGame:getGravity()
+    return 1/64
+end
+
+function SakuraGame:advanceOneFrame(inputs, ruleset)
+    if self.ready_frames == 0 then
+        if self.lcd > 0 then
+                if self.stage_frames <= frameTime(0,10) then self.time_extend = 600
+            elseif self.stage_frames <= frameTime(0,30) then self.time_extend = 300
+            else self.time_extend = 0 end
+        end
+
+        if not self.grid:hasGemBlocks() then
+            -- transition to next map
+            if self.cleared_frames > 0 then
+                self.cleared_frames = self.cleared_frames - 1
+                if self.time_extend >= 0 then
+                    self.time_limit = self.time_limit + 3
+                    self.time_extend = self.time_extend - 3
+                end
+                return false
+            end
+            
+            self.hold_queue = nil
+            self.stage_frames = -1
+            self.current_map = self.current_map + 1
+            self.grid:clear()
+            if self.current_map >= 21 then
+                self.clear = true
+                self.completed = true
+                return false
+            else
+                self.ready_frames = 100
+                self.grid:applyMap(maps[self.current_map])
+            end
+            
+            -- this is necessary to fix timer
+            self.frames = self.frames - 1
+            self.time_limit = self.time_limit + 1
+        end
+        
+        self.frames = self.frames + 1
+        self.stage_frames = self.stage_frames + 1
+        self.time_limit = self.time_limit - 1
+        if self.time_limit <= 0 then self.game_over = true end
+    else
+        self.cleared_frames = 300
+        if not self.prev_inputs.hold and inputs.hold then
+            self.hold_queue = table.remove(self.next_queue, 1)
+            table.insert(self.next_queue, self:getNextPiece(ruleset))
+        end
+    end
+    return true
+end
+
+function SakuraGame:drawGrid()
+    self.grid:draw()
+    self:drawGhostPiece()
+end
+
+function SakuraGame:drawScoringInfo()
+    love.graphics.setColor(1, 1, 1, 1)
+    
+    love.graphics.setFont(font_3x5_2)
+    love.graphics.print(
+		self.das.direction .. " " ..
+		self.das.frames .. " " ..
+		strTrueValues(self.prev_inputs)
+    )
+    love.graphics.printf("NEXT", 64, 40, 40, "left")
+    love.graphics.printf("STAGE", 240, 120, 80, "left")
+    love.graphics.printf("TIME LIMIT", 240, 180, 80, "left")
+    love.graphics.printf("STAGE TIME", 240, 240, 80, "left")
+
+    love.graphics.setFont(font_3x5_3)
+    love.graphics.setColor(
+        (self.time_limit % 4 < 2 and
+        self.time_limit <= frameTime(0,10) and
+        self.grid:hasGemBlocks() and
+        self.time_limit ~= 0) and
+        { 1, 0.3, 0.3, 1 } or
+        { 1, 1, 1, 1 }
+    )
+    love.graphics.printf(formatTime(self.time_limit), 240, 200, 120, "left")
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.printf(formatTime(self.stage_frames), 240, 260, 120, "left")
+
+    love.graphics.setFont(font_8x11)
+    love.graphics.printf(formatTime(self.frames), 64, 420, 160, "center")
+    love.graphics.printf(self.current_map, 290, 110, 80, "left")
+end
+
+function SakuraGame:drawCustom()
+    love.graphics.setColor(1, 1, 1, 1)
+
+    if self.ready_frames ~= 0 and not self.clear then
+        love.graphics.setFont(font_3x5_4)
+        love.graphics.printf("STAGE " .. self.current_map, 64, 170, 160, "center")
+    end
+
+    if self.cleared_frames > 0 and not self.grid:hasGemBlocks() then
+        love.graphics.setFont(font_3x5_2)
+        love.graphics.printf("TIME LIMIT", 64, 180, 160, "center")
+        love.graphics.printf("TIME EXTEND", 64, 240, 160, "center")
+        love.graphics.printf("STAGE TIME", 64, 300, 160, "center")
+        
+        love.graphics.setFont(font_3x5_3)
+        love.graphics.printf("STAGE " .. self.current_map, 64, 100, 160, "center")
+        love.graphics.setColor(
+            self.cleared_frames % 4 < 2 and
+            { 1, 1, 0.3, 1 } or
+            { 1, 1, 1, 1 }
+        )
+        love.graphics.printf(formatTime(self.time_limit), 64, 200, 160, "center")
+        love.graphics.setColor(1, 1, 1, 1)
+        love.graphics.printf(formatTime(self.time_extend), 64, 260, 160, "center")
+        love.graphics.printf(formatTime(self.stage_frames), 64, 320, 160, "center")
+
+        love.graphics.setFont(font_3x5_4)
+        love.graphics.printf("CLEAR!", 64, 130, 160, "center")
+    end
+
+    if self.clear then
+        love.graphics.setFont(font_3x5_3)
+        love.graphics.printf("EXCELLENT!", 64, 180, 160, "center")
+
+        love.graphics.setFont(font_3x5_2)
+        love.graphics.printf("...but let's go\nbetter next time", 64, 220, 160, "center")
+    end
+end
+
+function SakuraGame:getBackground()
+    return (self.current_map - 1) % 20
+end
+
+function SakuraGame:getHighscoreData()
+    return {
+        map = self.current_map,
+        frames = self.frames,
+    }
+end
+
+return SakuraGame
\ No newline at end of file